It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 137 120 816 is not a prime number.
For example, 137 120 816 can be divided by 2: 137 120 816 / 2 = 68 560 408.
For 137 120 816 to be a prime number, it would have been required that 137 120 816 has only two divisors, i.e., itself and 1.
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137 120 816 is an even number, because it is evenly divisible by 2: 137 120 816 / 2 = 68 560 408.
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A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 137 120 816 is about 11 709.860.
Thus, the square root of 137 120 816 is not an integer, and therefore 137 120 816 is not a square number.
The square of a number (here 137 120 816) is the result of the product of this number (137 120 816) by itself (i.e., 137 120 816 × 137 120 816); the square of 137 120 816 is sometimes called "raising 137 120 816 to the power 2", or "137 120 816 squared".
The square of 137 120 816 is 18 802 118 180 505 856 because 137 120 816 × 137 120 816 = 137 120 8162 = 18 802 118 180 505 856.
As a consequence, 137 120 816 is the square root of 18 802 118 180 505 856.
137 120 816 is a number with 9 digits.
The multiples of 137 120 816 are all integers evenly divisible by 137 120 816, that is all numbers such that the remainder of the division by 137 120 816 is zero. There are infinitely many multiples of 137 120 816. The smallest multiples of 137 120 816 are: