Yotta
Yotta (symbol Y) is a SI prefix in the SI system of units denoting 1024 or 1 000 000 000 000 000 000 000 000.
Adopted in 1991, it comes from the Greek όχτώ, meaning eight, because it is equal to 10008.
As of 2004, yotta- is the largest and last SI prefix to be confirmed.
See also