Multiplicative Inverse of 639

Multiplicative Inverse of 639 is defined as what you can multiply with 639 to get 1.
If the Multiplicative Inverse of 639 is x, the problem can be written as a function as follows:
639(x) = 1
Thus, to get the answer, we divide 1 by 639 like this:
1 / 639 = 0.00156495
Note that the answer is rounded to the nearest 8 decimals if necessary. We can prove that the answer is correct: 0.00156495 multiplied by 639 equals 1.
The Multiplicative Inverse of postive 639 has a positive answer and the Multiplicative Inverse of negative 639 has a negative answer. Therefore, the Multiplicative Inverse of -639 is -0.00156495.
Multiplicative Inverse of 640
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