Q: What is the negative version of the number 644,401,520?
A: -644,401,520
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:
| 644,401,518 | 644,401,519 | 644,401,521 | 644,401,522 |
| -644,401,518 | -644,401,519 | -644,401,521 | -644,401,522 |