86785995531 has 16 divisors (see below), whose sum is σ = 115949836800. Its totient is φ = 57739848288.

The previous prime is 86785995451. The next prime is 86785995553. The reversal of 86785995531 is 13559958768.

It is not a de Polignac number, because 86785995531 - 2²⁵ = 86752441099 is a prime.

It is a super-2 number, since 2×86785995531² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86785994531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3587980 + ... + 3612086.

It is an arithmetic number, because the mean of its divisors is an integer number (7246864800).

Almost surely, 2^86785995531 is an apocalyptic number.

86785995531 is a deficient number, since it is larger than the sum of its proper divisors (29163841269).

86785995531 is a wasteful number, since it uses less digits than its factorization.

86785995531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26498.

The product of its digits is 81648000, while the sum is 66.

The spelling of 86785995531 in words is "eighty-six billion, seven hundred eighty-five million, nine hundred ninety-five thousand, five hundred thirty-one".