Number of Zeros In a Quadrillion
How many zeros are there in a quadrillion?
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—1015 or just 1015. The word billion comes from the 16th Century French word quadrillion which referred to ‘˜quadri (‘œfour’) + (m)illion’™.