12517908534 has 64 divisors (see below), whose sum is σ = 27997747200. Its totient is φ = 4145708736.

The previous prime is 12517908497. The next prime is 12517908547. The reversal of 12517908534 is 43580971521.

12517908534 is a `hidden beast` number, since 1 + 25 + 1 + 7 + 90 + 8 + 534 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 12517908534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6066787 + ... + 6068849.

It is an arithmetic number, because the mean of its divisors is an integer number (437464800).

Almost surely, 2^12517908534 is an apocalyptic number.

12517908534 is an abundant number, since it is smaller than the sum of its proper divisors (15479838666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12517908534 is a wasteful number, since it uses less digits than its factorization.

12517908534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2746 (or 2740 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 12517908534 in words is "twelve billion, five hundred seventeen million, nine hundred eight thousand, five hundred thirty-four".