86877784931 has 12 divisors (see below), whose sum is σ = 105455910672. Its totient is φ = 71228990448.

The previous prime is 86877784909. The next prime is 86877784933. The reversal of 86877784931 is 13948777868.

It is not a de Polignac number, because 86877784931 - 2¹⁴ = 86877768547 is a prime.

It is a super-2 number, since 2×86877784931² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86877784933) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38542700 + ... + 38544953.

It is an arithmetic number, because the mean of its divisors is an integer number (8787992556).

Almost surely, 2^86877784931 is an apocalyptic number.

86877784931 is a deficient number, since it is larger than the sum of its proper divisors (18578125741).

86877784931 is a wasteful number, since it uses less digits than its factorization.

86877784931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77087690 (or 77087683 counting only the distinct ones).

The product of its digits is 113799168, while the sum is 68.

The spelling of 86877784931 in words is "eighty-six billion, eight hundred seventy-seven million, seven hundred eighty-four thousand, nine hundred thirty-one".