It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 494 991 648 is not a prime number.
For example, 494 991 648 can be divided by 2: 494 991 648 / 2 = 247 495 824.
For 494 991 648 to be a prime number, it would have been required that 494 991 648 has only two divisors, i.e., itself and 1.
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494 991 648 is an even number, because it is evenly divisible by 2: 494 991 648 / 2 = 247 495 824.
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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 494 991 648 is about 22 248.408.
Thus, the square root of 494 991 648 is not an integer, and therefore 494 991 648 is not a square number.
The square of a number (here 494 991 648) is the result of the product of this number (494 991 648) by itself (i.e., 494 991 648 × 494 991 648); the square of 494 991 648 is sometimes called "raising 494 991 648 to the power 2", or "494 991 648 squared".
The square of 494 991 648 is 245 016 731 589 755 904 because 494 991 648 × 494 991 648 = 494 991 6482 = 245 016 731 589 755 904.
As a consequence, 494 991 648 is the square root of 245 016 731 589 755 904.
494 991 648 is a number with 9 digits.
The multiples of 494 991 648 are all integers evenly divisible by 494 991 648, that is all numbers such that the remainder of the division by 494 991 648 is zero. There are infinitely many multiples of 494 991 648. The smallest multiples of 494 991 648 are: