686376864534 has 32 divisors (see below), whose sum is σ = 1403067108960. Its totient is φ = 223767295232.

The previous prime is 686376864521. The next prime is 686376864541. The reversal of 686376864534 is 435468673686.

It is a super-2 number, since 2×686376864534² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3303639 + ... + 3505250.

It is an arithmetic number, because the mean of its divisors is an integer number (43845847155).

Almost surely, 2^686376864534 is an apocalyptic number.

686376864534 is an abundant number, since it is smaller than the sum of its proper divisors (716690244426).

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

686376864534 is a wasteful number, since it uses less digits than its factorization.

686376864534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6809264.

The product of its digits is 418037760, while the sum is 66.

The spelling of 686376864534 in words is "six hundred eighty-six billion, three hundred seventy-six million, eight hundred sixty-four thousand, five hundred thirty-four".