685976869439 has 8 divisors (see below), whose sum is σ = 686270124000. Its totient is φ = 685683677952.

The previous prime is 685976869373. The next prime is 685976869477. The reversal of 685976869439 is 934968679586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685976869439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685976869489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44771822 + ... + 44787140.

It is an arithmetic number, because the mean of its divisors is an integer number (85783765500).

Almost surely, 2^685976869439 is an apocalyptic number.

685976869439 is a deficient number, since it is larger than the sum of its proper divisors (293254561).

685976869439 is a wasteful number, since it uses less digits than its factorization.

685976869439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31537.

The product of its digits is 4232632320, while the sum is 80.

The spelling of 685976869439 in words is "six hundred eighty-five billion, nine hundred seventy-six million, eight hundred sixty-nine thousand, four hundred thirty-nine".