It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 165 742 194 is not a prime number.
For example, 165 742 194 can be divided by 2: 165 742 194 / 2 = 82 871 097.
For 165 742 194 to be a prime number, it would have been required that 165 742 194 has only two divisors, i.e., itself and 1.
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165 742 194 is an even number, because it is evenly divisible by 2: 165 742 194 / 2 = 82 871 097.
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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 165 742 194 is about 12 874.090.
Thus, the square root of 165 742 194 is not an integer, and therefore 165 742 194 is not a square number.
The square of a number (here 165 742 194) is the result of the product of this number (165 742 194) by itself (i.e., 165 742 194 × 165 742 194); the square of 165 742 194 is sometimes called "raising 165 742 194 to the power 2", or "165 742 194 squared".
The square of 165 742 194 is 27 470 474 871 933 636 because 165 742 194 × 165 742 194 = 165 742 1942 = 27 470 474 871 933 636.
As a consequence, 165 742 194 is the square root of 27 470 474 871 933 636.
165 742 194 is a number with 9 digits.
The multiples of 165 742 194 are all integers evenly divisible by 165 742 194, that is all numbers such that the remainder of the division by 165 742 194 is zero. There are infinitely many multiples of 165 742 194. The smallest multiples of 165 742 194 are: