18144220559 has 2 divisors, whose sum is σ = 18144220560. Its totient is φ = 18144220558.

The previous prime is 18144220553. The next prime is 18144220571. The reversal of 18144220559 is 95502244181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18144220559 - 2¹⁶ = 18144155023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18144220553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9072110279 + 9072110280.

It is an arithmetic number, because the mean of its divisors is an integer number (9072110280).

Almost surely, 2^18144220559 is an apocalyptic number.

18144220559 is a deficient number, since it is larger than the sum of its proper divisors (1).

18144220559 is an equidigital number, since it uses as much as digits as its factorization.

18144220559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 41.

The spelling of 18144220559 in words is "eighteen billion, one hundred forty-four million, two hundred twenty thousand, five hundred fifty-nine".