It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 80 009 016 is not a prime number.
For example, 80 009 016 can be divided by 2: 80 009 016 / 2 = 40 004 508.
For 80 009 016 to be a prime number, it would have been required that 80 009 016 has only two divisors, i.e., itself and 1.
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80 009 016 is an even number, because it is evenly divisible by 2: 80 009 016 / 2 = 40 004 508.
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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 80 009 016 is about 8 944.776.
Thus, the square root of 80 009 016 is not an integer, and therefore 80 009 016 is not a square number.
The square of a number (here 80 009 016) is the result of the product of this number (80 009 016) by itself (i.e., 80 009 016 × 80 009 016); the square of 80 009 016 is sometimes called "raising 80 009 016 to the power 2", or "80 009 016 squared".
The square of 80 009 016 is 6 401 442 641 288 256 because 80 009 016 × 80 009 016 = 80 009 0162 = 6 401 442 641 288 256.
As a consequence, 80 009 016 is the square root of 6 401 442 641 288 256.
80 009 016 is a number with 8 digits.
The multiples of 80 009 016 are all integers evenly divisible by 80 009 016, that is all numbers such that the remainder of the division by 80 009 016 is zero. There are infinitely many multiples of 80 009 016. The smallest multiples of 80 009 016 are: