80636481531 has 16 divisors (see below), whose sum is σ = 126488599200. Its totient is φ = 50595439104.

The previous prime is 80636481487. The next prime is 80636481553. The reversal of 80636481531 is 13518463608.

80636481531 is a `hidden beast` number, since 8 + 0 + 6 + 36 + 4 + 81 + 531 = 666.

It is not a de Polignac number, because 80636481531 - 2¹⁸ = 80636219387 is a prime.

It is a super-2 number, since 2×80636481531² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80636481031) 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, 87838846 + ... + 87839763.

It is an arithmetic number, because the mean of its divisors is an integer number (7905537450).

Almost surely, 2^80636481531 is an apocalyptic number.

80636481531 is a deficient number, since it is larger than the sum of its proper divisors (45852117669).

80636481531 is a wasteful number, since it uses less digits than its factorization.

80636481531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175678635 (or 175678629 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 80636481531 in words is "eighty billion, six hundred thirty-six million, four hundred eighty-one thousand, five hundred thirty-one".