16518216868 has 12 divisors (see below), whose sum is σ = 29043880432. Its totient is φ = 8219965320.

The previous prime is 16518216859. The next prime is 16518216877. The reversal of 16518216868 is 86861281561.

It is an interprime number because it is at equal distance from previous prime (16518216859) and next prime (16518216877).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9784830 + ... + 9786517.

Almost surely, 2^16518216868 is an apocalyptic number.

It is an amenable number.

16518216868 is a deficient number, since it is larger than the sum of its proper divisors (12525663564).

16518216868 is a wasteful number, since it uses less digits than its factorization.

16518216868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19571562 (or 19571560 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 52.

The spelling of 16518216868 in words is "sixteen billion, five hundred eighteen million, two hundred sixteen thousand, eight hundred sixty-eight".