It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 80 509 804 is not a prime number.
For example, 80 509 804 can be divided by 2: 80 509 804 / 2 = 40 254 902.
For 80 509 804 to be a prime number, it would have been required that 80 509 804 has only two divisors, i.e., itself and 1.
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80 509 804 is an even number, because it is evenly divisible by 2: 80 509 804 / 2 = 40 254 902.
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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 80 509 804 is about 8 972.726.
Thus, the square root of 80 509 804 is not an integer, and therefore 80 509 804 is not a square number.
The square of a number (here 80 509 804) is the result of the product of this number (80 509 804) by itself (i.e., 80 509 804 × 80 509 804); the square of 80 509 804 is sometimes called "raising 80 509 804 to the power 2", or "80 509 804 squared".
The square of 80 509 804 is 6 481 828 540 118 416 because 80 509 804 × 80 509 804 = 80 509 8042 = 6 481 828 540 118 416.
As a consequence, 80 509 804 is the square root of 6 481 828 540 118 416.
80 509 804 is a number with 8 digits.
The multiples of 80 509 804 are all integers evenly divisible by 80 509 804, that is all numbers such that the remainder of the division by 80 509 804 is zero. There are infinitely many multiples of 80 509 804. The smallest multiples of 80 509 804 are: