Q: What is the negative version of the number 644,024,609?
A: -644,024,609
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:
| 644,024,607 | 644,024,608 | 644,024,610 | 644,024,611 |
| -644,024,607 | -644,024,608 | -644,024,610 | -644,024,611 |