685735916992 has 112 divisors (see below), whose sum is σ = 1577809635840. Its totient is φ = 289608883200.

The previous prime is 685735916951. The next prime is 685735916993. The reversal of 685735916992 is 299619537586.

685735916992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×685735916992² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685735916993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92525767 + ... + 92533177.

Almost surely, 2^685735916992 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 685735916992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (788904817920).

685735916992 is an abundant number, since it is smaller than the sum of its proper divisors (892073718848).

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

685735916992 is a wasteful number, since it uses less digits than its factorization.

685735916992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10410 (or 10400 counting only the distinct ones).

The product of its digits is 220449600, while the sum is 70.

The spelling of 685735916992 in words is "six hundred eighty-five billion, seven hundred thirty-five million, nine hundred sixteen thousand, nine hundred ninety-two".