12591667925 has 12 divisors (see below), whose sum is σ = 15616057056. Its totient is φ = 10071793200.

The previous prime is 12591667889. The next prime is 12591667931. The reversal of 12591667925 is 52976619521.

It is a de Polignac number, because none of the positive numbers 2^k-12591667925 is a prime.

It is a super-2 number, since 2×12591667925² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145352 + ... + 215198.

It is an arithmetic number, because the mean of its divisors is an integer number (1301338088).

Almost surely, 2^12591667925 is an apocalyptic number.

It is an amenable number.

12591667925 is a deficient number, since it is larger than the sum of its proper divisors (3024389131).

12591667925 is an equidigital number, since it uses as much as digits as its factorization.

12591667925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77068 (or 77063 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 53.

The spelling of 12591667925 in words is "twelve billion, five hundred ninety-one million, six hundred sixty-seven thousand, nine hundred twenty-five".