685112556 has 24 divisors (see below), whose sum is σ = 1628759664. Its totient is φ = 224061760.

The previous prime is 685112551. The next prime is 685112567. The reversal of 685112556 is 655211586.

It is not an unprimeable number, because it can be changed into a prime (685112551) 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, 537975 + ... + 539246.

It is an arithmetic number, because the mean of its divisors is an integer number (67864986).

Almost surely, 2^685112556 is an apocalyptic number.

It is an amenable number.

685112556 is an abundant number, since it is smaller than the sum of its proper divisors (943647108).

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

685112556 is a wasteful number, since it uses less digits than its factorization.

685112556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077281 (or 1077279 counting only the distinct ones).

The product of its digits is 72000, while the sum is 39.

The square root of 685112556 is about 26174.6548401311. The cubic root of 685112556 is about 881.5642615011.

The spelling of 685112556 in words is "six hundred eighty-five million, one hundred twelve thousand, five hundred fifty-six".