685559404955586 has 64 divisors (see below), whose sum is σ = 1571801814171648. Its totient is φ = 195273545974848.

The previous prime is 685559404955471. The next prime is 685559404955611.

685559404955586 is nontrivially palindromic in base 10.

685559404955586 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 685559404955499 and 685559404955508.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19119831 + ... + 41673573.

It is an arithmetic number, because the mean of its divisors is an integer number (24559403346432).

Almost surely, 2^{685559404955586} is an apocalyptic number.

685559404955586 is an abundant number, since it is smaller than the sum of its proper divisors (886242409216062).

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

685559404955586 is a wasteful number, since it uses less digits than its factorization.

685559404955586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22555975.

The product of its (nonzero) digits is 46656000000, while the sum is 84.

The spelling of 685559404955586 in words is "six hundred eighty-five trillion, five hundred fifty-nine billion, four hundred four million, nine hundred fifty-five thousand, five hundred eighty-six".