It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 42 716 718 is not a prime number.
For example, 42 716 718 can be divided by 2: 42 716 718 / 2 = 21 358 359.
For 42 716 718 to be a prime number, it would have been required that 42 716 718 has only two divisors, i.e., itself and 1.
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42 716 718 is an even number, because it is evenly divisible by 2: 42 716 718 / 2 = 21 358 359.
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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 42 716 718 is about 6 535.803.
Thus, the square root of 42 716 718 is not an integer, and therefore 42 716 718 is not a square number.
The square of a number (here 42 716 718) is the result of the product of this number (42 716 718) by itself (i.e., 42 716 718 × 42 716 718); the square of 42 716 718 is sometimes called "raising 42 716 718 to the power 2", or "42 716 718 squared".
The square of 42 716 718 is 1 824 717 996 691 524 because 42 716 718 × 42 716 718 = 42 716 7182 = 1 824 717 996 691 524.
As a consequence, 42 716 718 is the square root of 1 824 717 996 691 524.
42 716 718 is a number with 8 digits.
The multiples of 42 716 718 are all integers evenly divisible by 42 716 718, that is all numbers such that the remainder of the division by 42 716 718 is zero. There are infinitely many multiples of 42 716 718. The smallest multiples of 42 716 718 are: