Yotta is the largest decimal unit prefix in the metric system, denoting a factor of 1024 or 1000000000000000000000000. It has the unit symbol Y. The prefix name is derived from the Ancient Greek οκτώ (októ), meaning "eight", because it is equal to 10008. It was added as an SI prefix to the International System of Units (SI) in 1991.
Usage examples:
The mass of the Earth is 5972.6 Yg.
The mass of the oceans is about 1.4 Yg.
The total power output of the Sun is approximately 385 YW.
The observable universe is estimated to be 880 Ym in diameter.
One yottabyte (YB) is a unit of digital information...