It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 509 644 054 is not a prime number.
For example, 509 644 054 can be divided by 2: 509 644 054 / 2 = 254 822 027.
For 509 644 054 to be a prime number, it would have been required that 509 644 054 has only two divisors, i.e., itself and 1.
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509 644 054 is an even number, because it is evenly divisible by 2: 509 644 054 / 2 = 254 822 027.
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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 509 644 054 is about 22 575.297.
Thus, the square root of 509 644 054 is not an integer, and therefore 509 644 054 is not a square number.
The square of a number (here 509 644 054) is the result of the product of this number (509 644 054) by itself (i.e., 509 644 054 × 509 644 054); the square of 509 644 054 is sometimes called "raising 509 644 054 to the power 2", or "509 644 054 squared".
The square of 509 644 054 is 259 737 061 777 554 912 because 509 644 054 × 509 644 054 = 509 644 0542 = 259 737 061 777 554 912.
As a consequence, 509 644 054 is the square root of 259 737 061 777 554 912.
509 644 054 is a number with 9 digits.
The multiples of 509 644 054 are all integers evenly divisible by 509 644 054, that is all numbers such that the remainder of the division by 509 644 054 is zero. There are infinitely many multiples of 509 644 054. The smallest multiples of 509 644 054 are: