685619863360 has 28 divisors (see below), whose sum is σ = 1632632300388. Its totient is φ = 274247945216.

The previous prime is 685619863307. The next prime is 685619863399. The reversal of 685619863360 is 63368916586.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 265653653056 + 419966210304 = 515416^2 + 648048^2 .

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, 1071280717 + ... + 1071281356.

Almost surely, 2^685619863360 is an apocalyptic number.

It is an amenable number.

685619863360 is an abundant number, since it is smaller than the sum of its proper divisors (947012437028).

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

685619863360 is a wasteful number, since it uses less digits than its factorization.

685619863360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142562090 (or 2142562080 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 61.

The spelling of 685619863360 in words is "six hundred eighty-five billion, six hundred nineteen million, eight hundred sixty-three thousand, three hundred sixty".