18001884660559 has 4 divisors (see below), whose sum is σ = 18121102439920. Its totient is φ = 17882666881200.

The previous prime is 18001884660541. The next prime is 18001884660569. The reversal of 18001884660559 is 95506648810081.

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 18001884660559 - 2⁹ = 18001884660047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18001884660497 and 18001884660506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18001884660569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59608889454 + ... + 59608889755.

It is an arithmetic number, because the mean of its divisors is an integer number (4530275609980).

Almost surely, 2^{18001884660559} is an apocalyptic number.

18001884660559 is a deficient number, since it is larger than the sum of its proper divisors (119217779361).

18001884660559 is a wasteful number, since it uses less digits than its factorization.

18001884660559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119217779360.

The product of its (nonzero) digits is 16588800, while the sum is 61.

The spelling of 18001884660559 in words is "eighteen trillion, one billion, eight hundred eighty-four million, six hundred sixty thousand, five hundred fifty-nine".