18160899191 has 4 divisors (see below), whose sum is σ = 18163565400. Its totient is φ = 18158232984.

The previous prime is 18160899161. The next prime is 18160899203. The reversal of 18160899191 is 19199806181.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18160899191 - 2²² = 18156704887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18160899161) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1322861 + ... + 1336518.

It is an arithmetic number, because the mean of its divisors is an integer number (4540891350).

Almost surely, 2^18160899191 is an apocalyptic number.

18160899191 is a deficient number, since it is larger than the sum of its proper divisors (2666209).

18160899191 is an equidigital number, since it uses as much as digits as its factorization.

18160899191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2666208.

The product of its (nonzero) digits is 279936, while the sum is 53.

The spelling of 18160899191 in words is "eighteen billion, one hundred sixty million, eight hundred ninety-nine thousand, one hundred ninety-one".