685368388834 has 4 divisors (see below), whose sum is σ = 1028052583254. Its totient is φ = 342684194416.

The previous prime is 685368388813. The next prime is 685368388883. The reversal of 685368388834 is 438883863586.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 627496869609 + 57871519225 = 792147^2 + 240565^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171342097207 + ... + 171342097210.

Almost surely, 2^685368388834 is an apocalyptic number.

685368388834 is a deficient number, since it is larger than the sum of its proper divisors (342684194420).

685368388834 is a wasteful number, since it uses less digits than its factorization.

685368388834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342684194419.

The product of its digits is 637009920, while the sum is 70.

The spelling of 685368388834 in words is "six hundred eighty-five billion, three hundred sixty-eight million, three hundred eighty-eight thousand, eight hundred thirty-four".