It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 770 402 016 is not a prime number.
For example, 770 402 016 can be divided by 2: 770 402 016 / 2 = 385 201 008.
For 770 402 016 to be a prime number, it would have been required that 770 402 016 has only two divisors, i.e., itself and 1.
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770 402 016 is an even number, because it is evenly divisible by 2: 770 402 016 / 2 = 385 201 008.
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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 770 402 016 is about 27 756.117.
Thus, the square root of 770 402 016 is not an integer, and therefore 770 402 016 is not a square number.
The square of a number (here 770 402 016) is the result of the product of this number (770 402 016) by itself (i.e., 770 402 016 × 770 402 016); the square of 770 402 016 is sometimes called "raising 770 402 016 to the power 2", or "770 402 016 squared".
The square of 770 402 016 is 593 519 266 256 864 256 because 770 402 016 × 770 402 016 = 770 402 0162 = 593 519 266 256 864 256.
As a consequence, 770 402 016 is the square root of 593 519 266 256 864 256.
770 402 016 is a number with 9 digits.
The multiples of 770 402 016 are all integers evenly divisible by 770 402 016, that is all numbers such that the remainder of the division by 770 402 016 is zero. There are infinitely many multiples of 770 402 016. The smallest multiples of 770 402 016 are: