12505132817864 has 32 divisors (see below), whose sum is σ = 23715943352640. Its totient is φ = 6181244222400.

The previous prime is 12505132817753. The next prime is 12505132817909. The reversal of 12505132817864 is 46871823150521.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22409507 + ... + 22960754.

It is an arithmetic number, because the mean of its divisors is an integer number (741123229770).

Almost surely, 2^{12505132817864} is an apocalyptic number.

It is an amenable number.

12505132817864 is a deficient number, since it is larger than the sum of its proper divisors (11210810534776).

12505132817864 is a wasteful number, since it uses less digits than its factorization.

12505132817864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45370661 (or 45370657 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 53.

The spelling of 12505132817864 in words is "twelve trillion, five hundred five billion, one hundred thirty-two million, eight hundred seventeen thousand, eight hundred sixty-four".