It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 258 012 009 is not a prime number.
For example, 258 012 009 can be divided by 3: 258 012 009 / 3 = 86 004 003.
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For 258 012 009 to be a prime number, it would have been required that 258 012 009 has only two divisors, i.e., itself and 1.
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258 012 009 is an odd number, because it is not evenly divisible by 2.
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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 258 012 009 is about 16 062.752.
Thus, the square root of 258 012 009 is not an integer, and therefore 258 012 009 is not a square number.
The square of a number (here 258 012 009) is the result of the product of this number (258 012 009) by itself (i.e., 258 012 009 × 258 012 009); the square of 258 012 009 is sometimes called "raising 258 012 009 to the power 2", or "258 012 009 squared".
The square of 258 012 009 is 66 570 196 788 216 080 because 258 012 009 × 258 012 009 = 258 012 0092 = 66 570 196 788 216 080.
As a consequence, 258 012 009 is the square root of 66 570 196 788 216 080.
258 012 009 is a number with 9 digits.
The multiples of 258 012 009 are all integers evenly divisible by 258 012 009, that is all numbers such that the remainder of the division by 258 012 009 is zero. There are infinitely many multiples of 258 012 009. The smallest multiples of 258 012 009 are: