685489984586 has 16 divisors (see below), whose sum is σ = 1124835439680. Its totient is φ = 310718424480.

The previous prime is 685489984519. The next prime is 685489984643.

685489984586 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 685489984586.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43388531 + ... + 43404326.

It is an arithmetic number, because the mean of its divisors is an integer number (70302214980).

Almost surely, 2^685489984586 is an apocalyptic number.

685489984586 is a deficient number, since it is larger than the sum of its proper divisors (439345455094).

685489984586 is a wasteful number, since it uses less digits than its factorization.

685489984586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86793229.

The product of its digits is 4777574400, while the sum is 80.

The spelling of 685489984586 in words is "six hundred eighty-five billion, four hundred eighty-nine million, nine hundred eighty-four thousand, five hundred eighty-six".