Russian President Vladimir Putin has not been seen in public since March 5.

And with little further information to go by — his press secretary, Dmitry Peskov, said simply that there is "no reason to worry" and "everything is fine" — some have naturally assumed the most drastic possible thing that could have happened is what did happen.

"Putin umer" or "Putin has died," is now trending on the Russian Internet.

There's also a website that allows users to ask, "has Putin died?" (the automated response varies with responses like: "No, he's alive" and "No, that's not why it stinks in Moscow.")

And perhaps because people find the very notion rather unlikely, social media users have been trying to imagine what a world without Putin — or a heaven with him — might look like.

Has Putin Died? No idea, but Twitter's already buried him. RT @MrLatis #ПутинУмер? Не знаю, но твиттер его уже похоронил — Hannah Thoburn (@HannahThoburn) March 12, 2015

It's likely that he would have a mass funeral just like Vladimir Lenin, but would Putin be presented in his favored bare-chested uniform?

Would the outpouring of grief on state TV channels match the level of emotion shown when North Korean leader Kim Jong Il died?

And who would reach out to him first in heaven? Perhaps his longtime friend and former Venezuelan President Hugo Chavez?

Translation:

-Hello, Putin, is that you?

-Yes, and who's this?

-It's Chavez. Want to meet up?

- ALLO PUTIN ETO TI? - DA, A KTO ETO? - ETO CHAVEZ. VSTRETIMSYA? — Все Плохо (@sranysovok) March 12, 2015

But if Putin really were at death's door, would he really show up for his final meeting on time? (The Russian president is notoriously almost always running late)

Translation: It's already nearing noon ... and still no Putin!

Уж полдень близится.......а Путина всё нет! pic.twitter.com/WrPzpGOuTq — Serge N (@sergej_us0mf) March 12, 2015

And after all, dying isn't really in his interests.

Translation:

-Putin can't die.

-Why?

-It's not profitable.

- Путин не может умереть. - Почему? - Это ему не выгодно. — Ales Pilecki (@alespilecki) March 11, 2015

Really though — is this something to even joke about?

Ugly & macabre tweeting from the enlightened liberal side of the Russia House using #ПутинУмер pic.twitter.com/5QAstXY75y — IvorCrotty (@IvorCrotty) March 11, 2015

Besides, his press secretary, Peskov, has said despite his disappearance from public view he's still "holding meetings all the time" and even "breaking hands" along the way.

"Credible sources" indicate that Putin may have cancer:

"A credible source" says that #Putin has cancer, health deteriorated. Nemtsov killed due to fighting inside elites http://t.co/mwogYKcWNA — Yury Barmin (@yurybarmin) March 12, 2015

Others think that rumors about his health may be overblown:

Conspiracy theories abound online by respectable Russian journos that Putin is dead or terminally ill. Official trip delay now = death? — Devin Ackles (@DevinAckles) March 11, 2015

Business Insider contributed to this report.