685087069856 has 96 divisors (see below), whose sum is σ = 1595143549440. Its totient is φ = 283387539456.

The previous prime is 685087069847. The next prime is 685087069867. The reversal of 685087069856 is 658960780586.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20881241 + ... + 20914023.

It is an arithmetic number, because the mean of its divisors is an integer number (16616078640).

Almost surely, 2^685087069856 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 685087069856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (797571774720).

685087069856 is an abundant number, since it is smaller than the sum of its proper divisors (910056479584).

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

685087069856 is a wasteful number, since it uses less digits than its factorization.

685087069856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36046 (or 36038 counting only the distinct ones).

The product of its (nonzero) digits is 174182400, while the sum is 68.

The spelling of 685087069856 in words is "six hundred eighty-five billion, eighty-seven million, sixty-nine thousand, eight hundred fifty-six".