686996794988 has 48 divisors (see below), whose sum is σ = 1460350993920. Its totient is φ = 276222939264.

The previous prime is 686996794961. The next prime is 686996794997. The reversal of 686996794988 is 889497699686.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6213881 + ... + 6323472.

It is an arithmetic number, because the mean of its divisors is an integer number (30423979040).

Almost surely, 2^686996794988 is an apocalyptic number.

It is an amenable number.

686996794988 is an abundant number, since it is smaller than the sum of its proper divisors (773354198932).

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

686996794988 is a wasteful number, since it uses less digits than its factorization.

686996794988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12537486 (or 12537484 counting only the distinct ones).

The product of its digits is 20316635136, while the sum is 89.

The spelling of 686996794988 in words is "six hundred eighty-six billion, nine hundred ninety-six million, seven hundred ninety-four thousand, nine hundred eighty-eight".