107
91.7143
15.2857
26.75
No, 642 divided by 4 is 160.5
0.0078
160.5
0.0031
214
The largest number that will evenly divide all three is 6:36 / 6 = 642 / 6 = 7126 / 6 = 21
321
The number 642 is not a prime number as it can be divided by 2 aswell as itself and one.