It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 509 655 474 is not a prime number.
For example, 509 655 474 can be divided by 2: 509 655 474 / 2 = 254 827 737.
For 509 655 474 to be a prime number, it would have been required that 509 655 474 has only two divisors, i.e., itself and 1.
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509 655 474 is an even number, because it is evenly divisible by 2: 509 655 474 / 2 = 254 827 737.
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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 509 655 474 is about 22 575.550.
Thus, the square root of 509 655 474 is not an integer, and therefore 509 655 474 is not a square number.
The square of a number (here 509 655 474) is the result of the product of this number (509 655 474) by itself (i.e., 509 655 474 × 509 655 474); the square of 509 655 474 is sometimes called "raising 509 655 474 to the power 2", or "509 655 474 squared".
The square of 509 655 474 is 259 748 702 178 164 672 because 509 655 474 × 509 655 474 = 509 655 4742 = 259 748 702 178 164 672.
As a consequence, 509 655 474 is the square root of 259 748 702 178 164 672.
509 655 474 is a number with 9 digits.
The multiples of 509 655 474 are all integers evenly divisible by 509 655 474, that is all numbers such that the remainder of the division by 509 655 474 is zero. There are infinitely many multiples of 509 655 474. The smallest multiples of 509 655 474 are: