Definition

A number that is equal to one thousand trillion, or 1 followed by 15 zeros.

Example

The population of the world is estimated to be around seven quadrillion.

Conversation

Did you know that a quadrillion is a million billion?

Wow, that's a huge number!

Yeah, it's mind-blowing to think about how big that is.

I can’t even imagine having a quadrillion of anything!

Synonyms & Antonyms

Root Explanation

Quadrillion → It is formed from "quadra-" (from Latin "quattuor", meaning four) and "-illion" (a suffix used in large numbers, derived from the Latin "mille", meaning thousand). The word "quadrillion" refers to a number that is a thousand raised to the fourth power, or one followed by fifteen zeros.

Memory Tip

Think of 'four' ('quadra-') and 'thousand' ('-illion') to remember that a quadrillion is a thousand raised to the fourth power.

Visually Confused Words