After quadrillion comes quintillion in the common short-scale naming system. Quadrillion is 101510^{15}1015, and quintillion is 101810^{18}1018, so each step adds three zeros.

Number order

  • Quadrillion = 1,000,000,000,000,000.
  • Quintillion = 1,000,000,000,000,000,000.
  • Then come sextillion, septillion, octillion, nonillion, and decillion.

Simple pattern

The pattern usually increases by a factor of 1,000 each time, so the names move from million to billion to trillion to quadrillion to quintillion. That is the standard system used in English today.

Quick example

If you have 1 quadrillion and multiply it by 1,000, you get 1 quintillion.

Would you like the full list after quadrillion in a clean table?