12564971925 has 48 divisors (see below), whose sum is σ = 23393740800. Its totient is φ = 5895576000.

The previous prime is 12564971857. The next prime is 12564971953. The reversal of 12564971925 is 52917946521.

It is not a de Polignac number, because 12564971925 - 2⁸ = 12564971669 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 220075 + ... + 271224.

It is an arithmetic number, because the mean of its divisors is an integer number (487369600).

Almost surely, 2^12564971925 is an apocalyptic number.

12564971925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12564971925 is a deficient number, since it is larger than the sum of its proper divisors (10828768875).

12564971925 is a wasteful number, since it uses less digits than its factorization.

12564971925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491354 (or 491349 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 51.

It can be divided in two parts, 12564 and 971925, that added together give a palindrome (984489).

The spelling of 12564971925 in words is "twelve billion, five hundred sixty-four million, nine hundred seventy-one thousand, nine hundred twenty-five".