Q: What is the negative version of the number 644,421,237?
A: -644,421,237
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:
| 644,421,235 | 644,421,236 | 644,421,238 | 644,421,239 |
| -644,421,235 | -644,421,236 | -644,421,238 | -644,421,239 |