Q: What is the negative version of the number 645,057,221?
A: -645,057,221
Negative numbers are usually written with - in front of them. They represent a number that is less than zero.
Here are more examples of negative numbers in sequence:
| 645,057,219 | 645,057,220 | 645,057,222 | 645,057,223 |
| -645,057,219 | -645,057,220 | -645,057,222 | -645,057,223 |