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A Octogintillion (1 Octogintillion) is 10 to the power of 243 (10^243). This is an astronomical number!

How many zeros in a Octogintillion?

There are 243 zeros in a Octogintillion.

What's before Octogintillion?

A Novenseptuagintillion is smaller than a Octogintillion.

What's after Octogintillion?

A Unoctogintillion is larger than a Octogintillion.


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

Is Octogintillion the largest number?

Octogintillion 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.

Octogintillion written out

Octogintillion is written out as:


Big Numbers

This is just one of many really big numbers!

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