685687365 has 48 divisors (see below), whose sum is σ = 1299182976. Its totient is φ = 331785600.

The previous prime is 685687363. The next prime is 685687381. The reversal of 685687365 is 563786586.

685687365 is a `hidden beast` number, since 6 + 8 + 568 + 73 + 6 + 5 = 666.

It is not a de Polignac number, because 685687365 - 2¹ = 685687363 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685687363) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 319195 + ... + 321335.

It is an arithmetic number, because the mean of its divisors is an integer number (27066312).

Almost surely, 2^685687365 is an apocalyptic number.

It is an amenable number.

685687365 is a deficient number, since it is larger than the sum of its proper divisors (613495611).

685687365 is a wasteful number, since it uses less digits than its factorization.

685687365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2810 (or 2807 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 54.

The square root of 685687365 is about 26185.6327973948. The cubic root of 685687365 is about 881.8107365352.

The spelling of 685687365 in words is "six hundred eighty-five million, six hundred eighty-seven thousand, three hundred sixty-five".