684459518864 has 40 divisors (see below), whose sum is σ = 1446767356320. Its totient is φ = 311103161600.

The previous prime is 684459518861. The next prime is 684459518867. The reversal of 684459518864 is 468815954486.

It is an interprime number because it is at equal distance from previous prime (684459518861) and next prime (684459518867).

It is a junction number, because it is equal to n+sod(n) for n = 684459518794 and 684459518803.

It is not an unprimeable number, because it can be changed into a prime (684459518861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4175084 + ... + 4335924.

It is an arithmetic number, because the mean of its divisors is an integer number (36169183908).

Almost surely, 2^684459518864 is an apocalyptic number.

It is an amenable number.

684459518864 is an abundant number, since it is smaller than the sum of its proper divisors (762307837456).

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

684459518864 is a wasteful number, since it uses less digits than its factorization.

684459518864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185039 (or 185033 counting only the distinct ones).

The product of its digits is 265420800, while the sum is 68.

The spelling of 684459518864 in words is "six hundred eighty-four billion, four hundred fifty-nine million, five hundred eighteen thousand, eight hundred sixty-four".