686997036018 has 48 divisors (see below), whose sum is σ = 1576312897536. Its totient is φ = 215492807040.

The previous prime is 686997036013. The next prime is 686997036067. The reversal of 686997036018 is 810630799686.

It is not an unprimeable number, because it can be changed into a prime (686997036013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1697023 + ... + 2062493.

It is an arithmetic number, because the mean of its divisors is an integer number (32839852032).

Almost surely, 2^686997036018 is an apocalyptic number.

686997036018 is an abundant number, since it is smaller than the sum of its proper divisors (889315861518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

686997036018 is a wasteful number, since it uses less digits than its factorization.

686997036018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371639 (or 371636 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 63.

The spelling of 686997036018 in words is "six hundred eighty-six billion, nine hundred ninety-seven million, thirty-six thousand, eighteen".