18467512161 has 64 divisors (see below), whose sum is σ = 29446686720. Its totient is φ = 10076451840.

The previous prime is 18467512157. The next prime is 18467512171. The reversal of 18467512161 is 16121576481.

It is not a de Polignac number, because 18467512161 - 2² = 18467512157 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18467512111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9858921 + ... + 9860793.

It is an arithmetic number, because the mean of its divisors is an integer number (460104480).

Almost surely, 2^18467512161 is an apocalyptic number.

It is an amenable number.

18467512161 is a deficient number, since it is larger than the sum of its proper divisors (10979174559).

18467512161 is a wasteful number, since it uses less digits than its factorization.

18467512161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2166.

The product of its digits is 80640, while the sum is 42.

The spelling of 18467512161 in words is "eighteen billion, four hundred sixty-seven million, five hundred twelve thousand, one hundred sixty-one".