Q: What is the negative version of the number 646,405,639?
A: -646,405,639
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:
| 646,405,637 | 646,405,638 | 646,405,640 | 646,405,641 |
| -646,405,637 | -646,405,638 | -646,405,640 | -646,405,641 |