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A Sexoctogintillion (1 Sexoctogintillion) is 10 to the power of 261 (10^261). This is an excessively astronomical number!

How many zeros in a Sexoctogintillion?

There are 261 zeros in a Sexoctogintillion.

What's before Sexoctogintillion?

A Quinoctogintillion is smaller than a Sexoctogintillion.

What's after Sexoctogintillion?

A Septemoctogintillion is larger than a Sexoctogintillion.


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

Is Sexoctogintillion the largest number?

Sexoctogintillion 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.

Sexoctogintillion written out

Sexoctogintillion is written out as:


Big Numbers

This is just one of many really big numbers!

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