685569696 has 96 divisors (see below), whose sum is σ = 2062101888. Its totient is φ = 195363840.

The previous prime is 685569691. The next prime is 685569721. The reversal of 685569696 is 696965586.

685569696 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 (96).

It is not an unprimeable number, because it can be changed into a prime (685569691) 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, 308686 + ... + 310898.

It is an arithmetic number, because the mean of its divisors is an integer number (21480228).

Almost surely, 2^685569696 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 685569696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1031050944).

685569696 is an abundant number, since it is smaller than the sum of its proper divisors (1376532192).

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

685569696 is a wasteful number, since it uses less digits than its factorization.

685569696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2694 (or 2686 counting only the distinct ones).

The product of its digits is 20995200, while the sum is 60.

The square root of 685569696 is about 26183.3858773078. The cubic root of 685569696 is about 881.7602919114.

The spelling of 685569696 in words is "six hundred eighty-five million, five hundred sixty-nine thousand, six hundred ninety-six".