686405028696 has 64 divisors (see below), whose sum is σ = 1720468081920. Its totient is φ = 228208337280.

The previous prime is 686405028679. The next prime is 686405028697. The reversal of 686405028696 is 696820504686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686405028697) 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, 15616911 + ... + 15660801.

It is an arithmetic number, because the mean of its divisors is an integer number (26882313780).

Almost surely, 2^686405028696 is an apocalyptic number.

It is an amenable number.

686405028696 is an abundant number, since it is smaller than the sum of its proper divisors (1034063053224).

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

686405028696 is a wasteful number, since it uses less digits than its factorization.

686405028696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45576 (or 45572 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 60.

The spelling of 686405028696 in words is "six hundred eighty-six billion, four hundred five million, twenty-eight thousand, six hundred ninety-six".