Q: What is the negative version of the number 644,121,261?
A: -644,121,261
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:
| 644,121,259 | 644,121,260 | 644,121,262 | 644,121,263 |
| -644,121,259 | -644,121,260 | -644,121,262 | -644,121,263 |