It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 518 336 328 is not a prime number.
For example, 518 336 328 can be divided by 2: 518 336 328 / 2 = 259 168 164.
For 518 336 328 to be a prime number, it would have been required that 518 336 328 has only two divisors, i.e., itself and 1.
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518 336 328 is an even number, because it is evenly divisible by 2: 518 336 328 / 2 = 259 168 164.
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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 518 336 328 is about 22 767.001.
Thus, the square root of 518 336 328 is not an integer, and therefore 518 336 328 is not a square number.
The square of a number (here 518 336 328) is the result of the product of this number (518 336 328) by itself (i.e., 518 336 328 × 518 336 328); the square of 518 336 328 is sometimes called "raising 518 336 328 to the power 2", or "518 336 328 squared".
The square of 518 336 328 is 268 672 548 924 523 584 because 518 336 328 × 518 336 328 = 518 336 3282 = 268 672 548 924 523 584.
As a consequence, 518 336 328 is the square root of 268 672 548 924 523 584.
518 336 328 is a number with 9 digits.
The multiples of 518 336 328 are all integers evenly divisible by 518 336 328, that is all numbers such that the remainder of the division by 518 336 328 is zero. There are infinitely many multiples of 518 336 328. The smallest multiples of 518 336 328 are: