18168137164 has 6 divisors (see below), whose sum is σ = 31794240044. Its totient is φ = 9084068580.

The previous prime is 18168137159. The next prime is 18168137191. The reversal of 18168137164 is 46173186181.

It is an unprimeable number.

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, 2271017142 + ... + 2271017149.

Almost surely, 2^18168137164 is an apocalyptic number.

It is an amenable number.

18168137164 is a deficient number, since it is larger than the sum of its proper divisors (13626102880).

18168137164 is a wasteful number, since it uses less digits than its factorization.

18168137164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4542034295 (or 4542034293 counting only the distinct ones).

The product of its digits is 193536, while the sum is 46.

The spelling of 18168137164 in words is "eighteen billion, one hundred sixty-eight million, one hundred thirty-seven thousand, one hundred sixty-four".