18388677812466 has 64 divisors (see below), whose sum is σ = 40370047256448. Its totient is φ = 5549684709888.

The previous prime is 18388677812447. The next prime is 18388677812521. The reversal of 18388677812466 is 66421877688381.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6333181 + ... + 8768496.

It is an arithmetic number, because the mean of its divisors is an integer number (630781988382).

Almost surely, 2^{18388677812466} is an apocalyptic number.

18388677812466 is an abundant number, since it is smaller than the sum of its proper divisors (21981369443982).

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

18388677812466 is a wasteful number, since it uses less digits than its factorization.

18388677812466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15101995.

The product of its digits is 1040449536, while the sum is 75.

The spelling of 18388677812466 in words is "eighteen trillion, three hundred eighty-eight billion, six hundred seventy-seven million, eight hundred twelve thousand, four hundred sixty-six".