685222858018 has 8 divisors (see below), whose sum is σ = 1027904967360. Its totient is φ = 342587868900.

The previous prime is 685222858013. The next prime is 685222858039. The reversal of 685222858018 is 810858222586.

685222858018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 685222858018.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11743678 + ... + 11801881.

It is an arithmetic number, because the mean of its divisors is an integer number (128488120920).

Almost surely, 2^685222858018 is an apocalyptic number.

685222858018 is a deficient number, since it is larger than the sum of its proper divisors (342682109342).

685222858018 is a wasteful number, since it uses less digits than its factorization.

685222858018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23560112.

The product of its (nonzero) digits is 4915200, while the sum is 55.

The spelling of 685222858018 in words is "six hundred eighty-five billion, two hundred twenty-two million, eight hundred fifty-eight thousand, eighteen".