Googlek

The Googlek is equal to \(16^{256}\) and \(2^{2^10}\). It is the largest number mentioned in an informal proposal to change over to a hexadecimal number system. It was invented sometime between 2003 and 2007, although the exact date is not known.

It is approximately \(10^{308.2547}\), which is about 180 Cenuntillion.