Q: What is the negative version of the number 644,663,015?
A: -644,663,015
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:
| 644,663,013 | 644,663,014 | 644,663,016 | 644,663,017 |
| -644,663,013 | -644,663,014 | -644,663,016 | -644,663,017 |