685120670785 has 16 divisors (see below), whose sum is σ = 833778489600. Its totient is φ = 540376245376.

The previous prime is 685120670719. The next prime is 685120670813. The reversal of 685120670785 is 587076021586.

685120670785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 685120670785 - 2¹¹ = 685120668737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2064025 + ... + 2372854.

It is an arithmetic number, because the mean of its divisors is an integer number (52111155600).

Almost surely, 2^685120670785 is an apocalyptic number.

It is an amenable number.

685120670785 is a deficient number, since it is larger than the sum of its proper divisors (148657818815).

685120670785 is a wasteful number, since it uses less digits than its factorization.

685120670785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4437320.

The product of its (nonzero) digits is 5644800, while the sum is 55.

The spelling of 685120670785 in words is "six hundred eighty-five billion, one hundred twenty million, six hundred seventy thousand, seven hundred eighty-five".