It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 264 257 538 is not a prime number.
For example, 264 257 538 can be divided by 2: 264 257 538 / 2 = 132 128 769.
For 264 257 538 to be a prime number, it would have been required that 264 257 538 has only two divisors, i.e., itself and 1.
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264 257 538 is an even number, because it is evenly divisible by 2: 264 257 538 / 2 = 132 128 769.
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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 264 257 538 is about 16 256.000.
Thus, the square root of 264 257 538 is not an integer, and therefore 264 257 538 is not a square number.
The square of a number (here 264 257 538) is the result of the product of this number (264 257 538) by itself (i.e., 264 257 538 × 264 257 538); the square of 264 257 538 is sometimes called "raising 264 257 538 to the power 2", or "264 257 538 squared".
The square of 264 257 538 is 69 832 046 389 821 440 because 264 257 538 × 264 257 538 = 264 257 5382 = 69 832 046 389 821 440.
As a consequence, 264 257 538 is the square root of 69 832 046 389 821 440.
264 257 538 is a number with 9 digits.
The multiples of 264 257 538 are all integers evenly divisible by 264 257 538, that is all numbers such that the remainder of the division by 264 257 538 is zero. There are infinitely many multiples of 264 257 538. The smallest multiples of 264 257 538 are: