13172631556 has 24 divisors (see below), whose sum is σ = 26357861376. Its totient is φ = 5642713920.

The previous prime is 13172631551. The next prime is 13172631557. The reversal of 13172631556 is 65513627131.

It is a super-2 number, since 2×13172631556² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (13172631551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52321 + ... + 170536.

It is an arithmetic number, because the mean of its divisors is an integer number (1098244224).

Almost surely, 2^13172631556 is an apocalyptic number.

It is an amenable number.

13172631556 is an abundant number, since it is smaller than the sum of its proper divisors (13185229820).

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

13172631556 is a wasteful number, since it uses less digits than its factorization.

13172631556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224979 (or 224977 counting only the distinct ones).

The product of its digits is 113400, while the sum is 40.

The spelling of 13172631556 in words is "thirteen billion, one hundred seventy-two million, six hundred thirty-one thousand, five hundred fifty-six".