685854938809 has 8 divisors (see below), whose sum is σ = 687099888000. Its totient is φ = 684610129632.

The previous prime is 685854938789. The next prime is 685854938833. The reversal of 685854938809 is 908839458586.

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

It is a cyclic number.

It is not a de Polignac number, because 685854938809 - 2⁵ = 685854938777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685854932809) 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, 19623852 + ... + 19658770.

It is an arithmetic number, because the mean of its divisors is an integer number (85887486000).

Almost surely, 2^685854938809 is an apocalyptic number.

It is an amenable number.

685854938809 is a deficient number, since it is larger than the sum of its proper divisors (1244949191).

685854938809 is a wasteful number, since it uses less digits than its factorization.

685854938809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70007.

The product of its (nonzero) digits is 597196800, while the sum is 73.

The spelling of 685854938809 in words is "six hundred eighty-five billion, eight hundred fifty-four million, nine hundred thirty-eight thousand, eight hundred nine".