12579097521 has 12 divisors (see below), whose sum is σ = 17816762192. Its totient is φ = 7892766528.

The previous prime is 12579097501. The next prime is 12579097541.

It is a happy number.

12579097521 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (12579097501) and next prime (12579097541).

It is not a de Polignac number, because 12579097521 - 2⁷ = 12579097393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12579097501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7253515 + ... + 7255248.

Almost surely, 2^12579097521 is an apocalyptic number.

It is an amenable number.

12579097521 is a deficient number, since it is larger than the sum of its proper divisors (5237664671).

12579097521 is a wasteful number, since it uses less digits than its factorization.

12579097521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14508800 (or 14508783 counting only the distinct ones).

The product of its (nonzero) digits is 396900, while the sum is 48.

The spelling of 12579097521 in words is "twelve billion, five hundred seventy-nine million, ninety-seven thousand, five hundred twenty-one".