16918945989168 has 80 divisors (see below), whose sum is σ = 44831233804896. Its totient is φ = 5494977914880.

The previous prime is 16918945989167. The next prime is 16918945989181. The reversal of 16918945989168 is 86198954981961.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (16918945989167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4039555 + ... + 7082082.

Almost surely, 2^{16918945989168} is an apocalyptic number.

It is an amenable number.

16918945989168 is an abundant number, since it is smaller than the sum of its proper divisors (27912287815728).

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

16918945989168 is a wasteful number, since it uses less digits than its factorization.

16918945989168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11122462 (or 11122456 counting only the distinct ones).

The product of its digits is 2418647040, while the sum is 84.

The spelling of 16918945989168 in words is "sixteen trillion, nine hundred eighteen billion, nine hundred forty-five million, nine hundred eighty-nine thousand, one hundred sixty-eight".