685337216565 has 8 divisors (see below), whose sum is σ = 1096539546528. Its totient is φ = 365513182160.

The previous prime is 685337216533. The next prime is 685337216579. The reversal of 685337216565 is 565612733586.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 685337216565 - 2⁵ = 685337216533 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22844573871 + ... + 22844573900.

It is an arithmetic number, because the mean of its divisors is an integer number (137067443316).

Almost surely, 2^685337216565 is an apocalyptic number.

It is an amenable number.

685337216565 is a deficient number, since it is larger than the sum of its proper divisors (411202329963).

685337216565 is a wasteful number, since it uses less digits than its factorization.

685337216565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45689147779.

The product of its digits is 27216000, while the sum is 57.

The spelling of 685337216565 in words is "six hundred eighty-five billion, three hundred thirty-seven million, two hundred sixteen thousand, five hundred sixty-five".