It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 401 009 416 is not a prime number.
For example, 401 009 416 can be divided by 2: 401 009 416 / 2 = 200 504 708.
For 401 009 416 to be a prime number, it would have been required that 401 009 416 has only two divisors, i.e., itself and 1.
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401 009 416 is an even number, because it is evenly divisible by 2: 401 009 416 / 2 = 200 504 708.
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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 401 009 416 is about 20 025.219.
Thus, the square root of 401 009 416 is not an integer, and therefore 401 009 416 is not a square number.
The square of a number (here 401 009 416) is the result of the product of this number (401 009 416) by itself (i.e., 401 009 416 × 401 009 416); the square of 401 009 416 is sometimes called "raising 401 009 416 to the power 2", or "401 009 416 squared".
The square of 401 009 416 is 160 808 551 720 661 056 because 401 009 416 × 401 009 416 = 401 009 4162 = 160 808 551 720 661 056.
As a consequence, 401 009 416 is the square root of 160 808 551 720 661 056.
401 009 416 is a number with 9 digits.
The multiples of 401 009 416 are all integers evenly divisible by 401 009 416, that is all numbers such that the remainder of the division by 401 009 416 is zero. There are infinitely many multiples of 401 009 416. The smallest multiples of 401 009 416 are: