685222858016 has 12 divisors (see below), whose sum is σ = 1349032501782. Its totient is φ = 342611428992.

The previous prime is 685222858013. The next prime is 685222858039. The reversal of 685222858016 is 610858222586.

It can be written as a sum of positive squares in only one way, i.e., 619274563600 + 65948294416 = 786940^2 + 256804^2 .

It is not an unprimeable number, because it can be changed into a prime (685222858013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10706607125 + ... + 10706607188.

Almost surely, 2^685222858016 is an apocalyptic number.

It is an amenable number.

685222858016 is a deficient number, since it is larger than the sum of its proper divisors (663809643766).

685222858016 is a wasteful number, since it uses less digits than its factorization.

685222858016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21413214323 (or 21413214315 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 53.

The spelling of 685222858016 in words is "six hundred eighty-five billion, two hundred twenty-two million, eight hundred fifty-eight thousand, sixteen".