12517963881 has 16 divisors (see below), whose sum is σ = 16908994560. Its totient is φ = 8236210320.

The previous prime is 12517963867. The next prime is 12517963943. The reversal of 12517963881 is 18836971521.

It is not a de Polignac number, because 12517963881 - 2¹⁷ = 12517832809 is a prime.

It is a super-2 number, since 2×12517963881² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12517963181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 632766 + ... + 652248.

It is an arithmetic number, because the mean of its divisors is an integer number (1056812160).

Almost surely, 2^12517963881 is an apocalyptic number.

It is an amenable number.

12517963881 is a deficient number, since it is larger than the sum of its proper divisors (4391030679).

12517963881 is a wasteful number, since it uses less digits than its factorization.

12517963881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22276.

The product of its digits is 725760, while the sum is 51.

The spelling of 12517963881 in words is "twelve billion, five hundred seventeen million, nine hundred sixty-three thousand, eight hundred eighty-one".