686088807780 has 48 divisors (see below), whose sum is σ = 1922004270144. Its totient is φ = 182866005120.

The previous prime is 686088807773. The next prime is 686088807797. The reversal of 686088807780 is 87708880686.

It is a happy 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, 2722407 + ... + 2963726.

It is an arithmetic number, because the mean of its divisors is an integer number (40041755628).

Almost surely, 2^686088807780 is an apocalyptic number.

686088807780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

686088807780 is an abundant number, since it is smaller than the sum of its proper divisors (1235915462364).

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

686088807780 is a wasteful number, since it uses less digits than its factorization.

686088807780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5688156 (or 5688154 counting only the distinct ones).

The product of its (nonzero) digits is 57802752, while the sum is 66.

The spelling of 686088807780 in words is "six hundred eighty-six billion, eighty-eight million, eight hundred seven thousand, seven hundred eighty".