685852912836 has 72 divisors (see below), whose sum is σ = 2133764627904. Its totient is φ = 180884283840.

The previous prime is 685852912831. The next prime is 685852912837. The reversal of 685852912836 is 638219258586.

685852912836 is a `hidden beast` number, since 6 + 8 + 58 + 529 + 1 + 28 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (685852912831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104675130 + ... + 104681681.

It is an arithmetic number, because the mean of its divisors is an integer number (29635619832).

Almost surely, 2^685852912836 is an apocalyptic number.

It is an amenable number.

685852912836 is an abundant number, since it is smaller than the sum of its proper divisors (1447911715068).

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

685852912836 is a wasteful number, since it uses less digits than its factorization.

685852912836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209356841 (or 209356836 counting only the distinct ones).

The product of its digits is 49766400, while the sum is 63.

The spelling of 685852912836 in words is "six hundred eighty-five billion, eight hundred fifty-two million, nine hundred twelve thousand, eight hundred thirty-six".