685808648216 has 16 divisors (see below), whose sum is σ = 1286563429800. Its totient is φ = 342725066944.

The previous prime is 685808648207. The next prime is 685808648219. The reversal of 685808648216 is 612846808586.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685808648219) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 22390886 + ... + 22421493.

Almost surely, 2^685808648216 is an apocalyptic number.

It is an amenable number.

685808648216 is a deficient number, since it is larger than the sum of its proper divisors (600754781584).

685808648216 is a wasteful number, since it uses less digits than its factorization.

685808648216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44814298 (or 44814294 counting only the distinct ones).

The product of its (nonzero) digits is 35389440, while the sum is 62.

The spelling of 685808648216 in words is "six hundred eighty-five billion, eight hundred eight million, six hundred forty-eight thousand, two hundred sixteen".