18091677312 has 48 divisors (see below), whose sum is σ = 52060689330. Its totient is φ = 6030558720.

The previous prime is 18091677281. The next prime is 18091677323. The reversal of 18091677312 is 21377619081.

18091677312 is a `hidden beast` number, since 180 + 91 + 6 + 77 + 312 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15401802816 + 2689874496 = 124104^2 + 51864^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7851139 + ... + 7853442.

Almost surely, 2^18091677312 is an apocalyptic number.

18091677312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18091677312 is an abundant number, since it is smaller than the sum of its proper divisors (33969012018).

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

18091677312 is a wasteful number, since it uses less digits than its factorization.

18091677312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15704601 (or 15704586 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The spelling of 18091677312 in words is "eighteen billion, ninety-one million, six hundred seventy-seven thousand, three hundred twelve".