685568834438 has 32 divisors (see below), whose sum is σ = 1061205691392. Its totient is φ = 331981020000.

The previous prime is 685568834413. The next prime is 685568834441. The reversal of 685568834438 is 834438865586.

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, 4742468 + ... + 4884888.

It is an arithmetic number, because the mean of its divisors is an integer number (33162677856).

Almost surely, 2^685568834438 is an apocalyptic number.

685568834438 is a deficient number, since it is larger than the sum of its proper divisors (375636856954).

685568834438 is a wasteful number, since it uses less digits than its factorization.

685568834438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142940.

The product of its digits is 530841600, while the sum is 68.

The spelling of 685568834438 in words is "six hundred eighty-five billion, five hundred sixty-eight million, eight hundred thirty-four thousand, four hundred thirty-eight".