Q: What is the negative version of the number 644,005,163?
A: -644,005,163
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:
| 644,005,161 | 644,005,162 | 644,005,164 | 644,005,165 |
| -644,005,161 | -644,005,162 | -644,005,164 | -644,005,165 |