It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 494 991 664 is not a prime number.
For example, 494 991 664 can be divided by 2: 494 991 664 / 2 = 247 495 832.
For 494 991 664 to be a prime number, it would have been required that 494 991 664 has only two divisors, i.e., itself and 1.
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494 991 664 is an even number, because it is evenly divisible by 2: 494 991 664 / 2 = 247 495 832.
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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 494 991 664 is about 22 248.408.
Thus, the square root of 494 991 664 is not an integer, and therefore 494 991 664 is not a square number.
The square of a number (here 494 991 664) is the result of the product of this number (494 991 664) by itself (i.e., 494 991 664 × 494 991 664); the square of 494 991 664 is sometimes called "raising 494 991 664 to the power 2", or "494 991 664 squared".
The square of 494 991 664 is 245 016 747 429 488 896 because 494 991 664 × 494 991 664 = 494 991 6642 = 245 016 747 429 488 896.
As a consequence, 494 991 664 is the square root of 245 016 747 429 488 896.
494 991 664 is a number with 9 digits.
The multiples of 494 991 664 are all integers evenly divisible by 494 991 664, that is all numbers such that the remainder of the division by 494 991 664 is zero. There are infinitely many multiples of 494 991 664. The smallest multiples of 494 991 664 are: