686808059904 has 416 divisors, whose sum is σ = 2162172372480. Its totient is φ = 214695936000.

The previous prime is 686808059879. The next prime is 686808059939. The reversal of 686808059904 is 409950808686.

It is a super-2 number, since 2×686808059904² (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 31 ways as a sum of consecutive naturals, for example, 753905209 + ... + 753906119.

Almost surely, 2^686808059904 is an apocalyptic number.

686808059904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686808059904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1081086186240).

686808059904 is an abundant number, since it is smaller than the sum of its proper divisors (1475364312576).

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

686808059904 is a wasteful number, since it uses less digits than its factorization.

686808059904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362 (or 1334 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 63.

The spelling of 686808059904 in words is "six hundred eighty-six billion, eight hundred eight million, fifty-nine thousand, nine hundred four".