685277338056 has 128 divisors (see below), whose sum is σ = 1839973847040. Its totient is φ = 212153356800.

The previous prime is 685277338037. The next prime is 685277338117. The reversal of 685277338056 is 650833772586.

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, 4703601 + ... + 4847103.

It is an arithmetic number, because the mean of its divisors is an integer number (14374795680).

Almost surely, 2^685277338056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685277338056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (919986923520).

685277338056 is an abundant number, since it is smaller than the sum of its proper divisors (1154696508984).

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

685277338056 is a wasteful number, since it uses less digits than its factorization.

685277338056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143787 (or 143783 counting only the distinct ones).

The product of its (nonzero) digits is 50803200, while the sum is 60.

The spelling of 685277338056 in words is "six hundred eighty-five billion, two hundred seventy-seven million, three hundred thirty-eight thousand, fifty-six".