Q: What is the negative version of the number 644,405,501?
A: -644,405,501
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:
| 644,405,499 | 644,405,500 | 644,405,502 | 644,405,503 |
| -644,405,499 | -644,405,500 | -644,405,502 | -644,405,503 |