686191964882 has 16 divisors (see below), whose sum is σ = 1030834936320. Its totient is φ = 342580410288.

The previous prime is 686191964879. The next prime is 686191964891. The reversal of 686191964882 is 288469191686.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26031233 + ... + 26057579.

It is an arithmetic number, because the mean of its divisors is an integer number (64427183520).

Almost surely, 2^686191964882 is an apocalyptic number.

686191964882 is a deficient number, since it is larger than the sum of its proper divisors (344642971438).

686191964882 is a wasteful number, since it uses less digits than its factorization.

686191964882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45425.

The product of its digits is 71663616, while the sum is 68.

The spelling of 686191964882 in words is "six hundred eighty-six billion, one hundred ninety-one million, nine hundred sixty-four thousand, eight hundred eighty-two".