12538516891975 has 12 divisors (see below), whose sum is σ = 16462335119904. Its totient is φ = 9440765659520.

The previous prime is 12538516891961. The next prime is 12538516891987. The reversal of 12538516891975 is 57919861583521.

It is not a de Polignac number, because 12538516891975 - 2¹⁵ = 12538516859207 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14751195919 + ... + 14751196768.

It is an arithmetic number, because the mean of its divisors is an integer number (1371861259992).

Almost surely, 2^{12538516891975} is an apocalyptic number.

12538516891975 is a deficient number, since it is larger than the sum of its proper divisors (3923818227929).

12538516891975 is a wasteful number, since it uses less digits than its factorization.

12538516891975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29502392714 (or 29502392709 counting only the distinct ones).

The product of its digits is 163296000, while the sum is 70.

The spelling of 12538516891975 in words is "twelve trillion, five hundred thirty-eight billion, five hundred sixteen million, eight hundred ninety-one thousand, nine hundred seventy-five".