Q: What is the negative version of the number 644,636,144?
A: -644,636,144
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:
| 644,636,142 | 644,636,143 | 644,636,145 | 644,636,146 |
| -644,636,142 | -644,636,143 | -644,636,145 | -644,636,146 |