685090600804 has 27 divisors (see below), whose sum is σ = 1202683537657. Its totient is φ = 341470115504.

The previous prime is 685090600793. The next prime is 685090600807. The reversal of 685090600804 is 408006090586.

The square root of 685090600804 is 827702.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 60118136100 + 624972464704 = 245190^2 + 790552^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685090600807) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 922059657 + ... + 922060399.

Almost surely, 2^685090600804 is an apocalyptic number.

685090600804 is the 827702-nd square number.

It is an amenable number.

685090600804 is a deficient number, since it is larger than the sum of its proper divisors (517592936853).

685090600804 is an frugal number, since it uses more digits than its factorization.

685090600804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2604 (or 1302 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 685090600804 in words is "six hundred eighty-five billion, ninety million, six hundred thousand, eight hundred four".