685248716800 has 84 divisors (see below), whose sum is σ = 1699313601366. Its totient is φ = 274099404800.

The previous prime is 685248716797. The next prime is 685248716807. The reversal of 685248716800 is 8617842586.

It can be written as a sum of positive squares in 3 ways, for example, as 362770108416 + 322478608384 = 602304^2 + 567872^2 .

It is not an unprimeable number, because it can be changed into a prime (685248716807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1468171 + ... + 1877770.

Almost surely, 2^685248716800 is an apocalyptic number.

It is an amenable number.

685248716800 is an abundant number, since it is smaller than the sum of its proper divisors (1014064884566).

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

685248716800 is an equidigital number, since it uses as much as digits as its factorization.

685248716800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3345977 (or 3345948 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 55.

The spelling of 685248716800 in words is "six hundred eighty-five billion, two hundred forty-eight million, seven hundred sixteen thousand, eight hundred".