685222238044 has 48 divisors (see below), whose sum is σ = 1244316427200. Its totient is φ = 329777796096.

The previous prime is 685222238021. The next prime is 685222238087. The reversal of 685222238044 is 440832222586.

It is a junction number, because it is equal to n+sod(n) for n = 685222237985 and 685222238003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52065937 + ... + 52079095.

It is an arithmetic number, because the mean of its divisors is an integer number (25923258900).

Almost surely, 2^685222238044 is an apocalyptic number.

It is an amenable number.

685222238044 is a deficient number, since it is larger than the sum of its proper divisors (559094189156).

685222238044 is a wasteful number, since it uses less digits than its factorization.

685222238044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14542 (or 14540 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 46.

The spelling of 685222238044 in words is "six hundred eighty-five billion, two hundred twenty-two million, two hundred thirty-eight thousand, forty-four".