12641156931 has 16 divisors (see below), whose sum is σ = 19106743040. Its totient is φ = 7369742880.

The previous prime is 12641156929. The next prime is 12641156933. The reversal of 12641156931 is 13965114621.

It is an interprime number because it is at equal distance from previous prime (12641156929) and next prime (12641156933).

It is not a de Polignac number, because 12641156931 - 2¹ = 12641156929 is a prime.

It is a super-2 number, since 2×12641156931² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12641156931.

It is not an unprimeable number, because it can be changed into a prime (12641156933) 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, 8529055 + ... + 8530536.

It is an arithmetic number, because the mean of its divisors is an integer number (1194171440).

Almost surely, 2^12641156931 is an apocalyptic number.

12641156931 is a deficient number, since it is larger than the sum of its proper divisors (6465586109).

12641156931 is a wasteful number, since it uses less digits than its factorization.

12641156931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17059626.

The product of its digits is 38880, while the sum is 39.

The spelling of 12641156931 in words is "twelve billion, six hundred forty-one million, one hundred fifty-six thousand, nine hundred thirty-one".