684338303856 has 20 divisors (see below), whose sum is σ = 1767873951752. Its totient is φ = 228112767936.

The previous prime is 684338303843. The next prime is 684338303897. The reversal of 684338303856 is 658303833486.

It is a junction number, because it is equal to n+sod(n) for n = 684338303796 and 684338303805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7128523951 + ... + 7128524046.

Almost surely, 2^684338303856 is an apocalyptic number.

It is an amenable number.

684338303856 is an abundant number, since it is smaller than the sum of its proper divisors (1083535647896).

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

684338303856 is a wasteful number, since it uses less digits than its factorization.

684338303856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14257048008 (or 14257048002 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 57.

The spelling of 684338303856 in words is "six hundred eighty-four billion, three hundred thirty-eight million, three hundred three thousand, eight hundred fifty-six".