685758857585 has 16 divisors (see below), whose sum is σ = 836479319040. Its totient is φ = 539562978240.

The previous prime is 685758857573. The next prime is 685758857591. The reversal of 685758857585 is 585758857586.

It is not a de Polignac number, because 685758857585 - 2⁶ = 685758857521 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, 3340424 + ... + 3539766.

It is an arithmetic number, because the mean of its divisors is an integer number (52279957440).

Almost surely, 2^685758857585 is an apocalyptic number.

It is an amenable number.

685758857585 is a deficient number, since it is larger than the sum of its proper divisors (150720461455).

685758857585 is a wasteful number, since it uses less digits than its factorization.

685758857585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210688.

The product of its digits is 3763200000, while the sum is 77.

Subtracting from 685758857585 its reverse (585758857586), we obtain a palindrome (99999999999).

The spelling of 685758857585 in words is "six hundred eighty-five billion, seven hundred fifty-eight million, eight hundred fifty-seven thousand, five hundred eighty-five".