684564568 has 64 divisors (see below), whose sum is σ = 1409875200. Its totient is φ = 310210560.

The previous prime is 684564553. The next prime is 684564583. The reversal of 684564568 is 865465486.

It is an interprime number because it is at equal distance from previous prime (684564553) and next prime (684564583).

It is a super-2 number, since 2×684564568² = 937257295522053248, which 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 15 ways as a sum of consecutive naturals, for example, 1673548 + ... + 1673956.

It is an arithmetic number, because the mean of its divisors is an integer number (22029300).

Almost surely, 2^684564568 is an apocalyptic number.

684564568 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

684564568 is an abundant number, since it is smaller than the sum of its proper divisors (725310632).

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

684564568 is a wasteful number, since it uses less digits than its factorization.

684564568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860 (or 856 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 52.

The square root of 684564568 is about 26164.1848334704. The cubic root of 684564568 is about 881.3291587730.

The spelling of 684564568 in words is "six hundred eighty-four million, five hundred sixty-four thousand, five hundred sixty-eight".