## Number of Zeros In a Quadrillion

**How many zeros are there in a quadrillion?**

**15.**

The number 1 quadrillion has 15 zeros. Written in numerical notation, 1 quadrillion is equivalent to 1,000,000,000,000,000.Â It is also sometimes called one thousand trillion and is written in scientific notation as 1Ã—10^{15} or just 10^{15}. The word billion comes from the 16^{th} Century French word *quadrillion *which referred to ‘˜quadri (‘œfour’) + (m)illion’™.

This fact is verified on : February 13, 2010.