685384071869 has 8 divisors (see below), whose sum is σ = 799961956608. Its totient is φ = 574972655760.

The previous prime is 685384071859. The next prime is 685384071899. The reversal of 685384071869 is 968170483586.

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-685384071869 is a prime.

It is a super-2 number, since 2×685384071869² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685384071859) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1041616802 + ... + 1041617459.

It is an arithmetic number, because the mean of its divisors is an integer number (99995244576).

Almost surely, 2^685384071869 is an apocalyptic number.

It is an amenable number.

685384071869 is a deficient number, since it is larger than the sum of its proper divisors (114577884739).

685384071869 is a wasteful number, since it uses less digits than its factorization.

685384071869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2083234315.

The product of its (nonzero) digits is 69672960, while the sum is 65.

The spelling of 685384071869 in words is "six hundred eighty-five billion, three hundred eighty-four million, seventy-one thousand, eight hundred sixty-nine".