18912155326164 has 36 divisors (see below), whose sum is σ = 47844814975776. Its totient is φ = 6298897180368.

The previous prime is 18912155326159. The next prime is 18912155326189. The reversal of 18912155326164 is 46162355121981.

18912155326164 is a `hidden beast` number, since 1 + 8 + 9 + 1 + 2 + 1 + 553 + 26 + 1 + 64 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18912155326164.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 214730154 + ... + 214818209.

It is an arithmetic number, because the mean of its divisors is an integer number (1329022638216).

Almost surely, 2^{18912155326164} is an apocalyptic number.

It is an amenable number.

18912155326164 is an abundant number, since it is smaller than the sum of its proper divisors (28932659649612).

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

18912155326164 is a wasteful number, since it uses less digits than its factorization.

18912155326164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429549596 (or 429549591 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The spelling of 18912155326164 in words is "eighteen trillion, nine hundred twelve billion, one hundred fifty-five million, three hundred twenty-six thousand, one hundred sixty-four".