Q: What is the negative version of the number 644,304,561?
A: -644,304,561
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:
| 644,304,559 | 644,304,560 | 644,304,562 | 644,304,563 |
| -644,304,559 | -644,304,560 | -644,304,562 | -644,304,563 |