18045564117 has 8 divisors (see below), whose sum is σ = 27498002496. Its totient is φ = 10311750912.

The previous prime is 18045564091. The next prime is 18045564137. The reversal of 18045564117 is 71146554081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18045564117 - 2³⁰ = 16971822293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18045564137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429656268 + ... + 429656309.

It is an arithmetic number, because the mean of its divisors is an integer number (3437250312).

Almost surely, 2^18045564117 is an apocalyptic number.

It is an amenable number.

18045564117 is a deficient number, since it is larger than the sum of its proper divisors (9452438379).

18045564117 is an equidigital number, since it uses as much as digits as its factorization.

18045564117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859312587.

The product of its (nonzero) digits is 134400, while the sum is 42.

The spelling of 18045564117 in words is "eighteen billion, forty-five million, five hundred sixty-four thousand, one hundred seventeen".