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A Unoctogintillion (1 Unoctogintillion) is 10 to the power of 246 (10^246). This is a very astronomical number!

How many zeros in a Unoctogintillion?

There are 246 zeros in a Unoctogintillion.

What's before Unoctogintillion?

A Octogintillion is smaller than a Unoctogintillion.

What's after Unoctogintillion?

A Duooctogintillion is larger than a Unoctogintillion.


A Unoctogintillionaire is someone whos assets, net worth or wealth is 1 or more Unoctogintillion. It is unlikely anyone will ever be a true Unoctogintillionaire. If you want to be a Unoctogintillionaire, play Tap Tales!

Is Unoctogintillion the largest number?

Unoctogintillion is not the largest number. Infinity best describes the largest possible number - if there even is one! We cannot comprehend what the largest number actually is.

Unoctogintillion written out

Unoctogintillion is written out as:


Big Numbers

This is just one of many really big numbers!

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