It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 499 849 016 is not a prime number.
For example, 499 849 016 can be divided by 2: 499 849 016 / 2 = 249 924 508.
For 499 849 016 to be a prime number, it would have been required that 499 849 016 has only two divisors, i.e., itself and 1.
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499 849 016 is an even number, because it is evenly divisible by 2: 499 849 016 / 2 = 249 924 508.
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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 499 849 016 is about 22 357.303.
Thus, the square root of 499 849 016 is not an integer, and therefore 499 849 016 is not a square number.
The square of a number (here 499 849 016) is the result of the product of this number (499 849 016) by itself (i.e., 499 849 016 × 499 849 016); the square of 499 849 016 is sometimes called "raising 499 849 016 to the power 2", or "499 849 016 squared".
The square of 499 849 016 is 249 849 038 796 168 256 because 499 849 016 × 499 849 016 = 499 849 0162 = 249 849 038 796 168 256.
As a consequence, 499 849 016 is the square root of 249 849 038 796 168 256.
499 849 016 is a number with 9 digits.
The multiples of 499 849 016 are all integers evenly divisible by 499 849 016, that is all numbers such that the remainder of the division by 499 849 016 is zero. There are infinitely many multiples of 499 849 016. The smallest multiples of 499 849 016 are: