685173433677 has 16 divisors (see below), whose sum is σ = 922839485568. Its totient is φ = 452148733440.

The previous prime is 685173433669. The next prime is 685173433687. The reversal of 685173433677 is 776334371586.

It is not a de Polignac number, because 685173433677 - 2³ = 685173433669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 685173433677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685173433627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218773 + ... + 1190885.

It is an arithmetic number, because the mean of its divisors is an integer number (57677467848).

Almost surely, 2^685173433677 is an apocalyptic number.

It is an amenable number.

685173433677 is a deficient number, since it is larger than the sum of its proper divisors (237666051891).

685173433677 is a wasteful number, since it uses less digits than its factorization.

685173433677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974500.

The product of its digits is 53343360, while the sum is 60.

The spelling of 685173433677 in words is "six hundred eighty-five billion, one hundred seventy-three million, four hundred thirty-three thousand, six hundred seventy-seven".