685854938808 has 192 divisors, whose sum is σ = 2048988221280. Its totient is φ = 205917465600.

The previous prime is 685854938789. The next prime is 685854938833. The reversal of 685854938808 is 808839458586.

685854938808 is a `hidden beast` number, since 6 + 8 + 58 + 5 + 493 + 8 + 80 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42695098 + ... + 42711158.

Almost surely, 2^685854938808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685854938808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1024494110640).

685854938808 is an abundant number, since it is smaller than the sum of its proper divisors (1363133282472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

685854938808 is a wasteful number, since it uses less digits than its factorization.

685854938808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17190 (or 17183 counting only the distinct ones).

The product of its (nonzero) digits is 530841600, while the sum is 72.

The spelling of 685854938808 in words is "six hundred eighty-five billion, eight hundred fifty-four million, nine hundred thirty-eight thousand, eight hundred eight".