18049155559 has 2 divisors, whose sum is σ = 18049155560. Its totient is φ = 18049155558.

The previous prime is 18049155533. The next prime is 18049155577. The reversal of 18049155559 is 95555194081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18049155559 - 2¹¹ = 18049153511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18049155599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9024577779 + 9024577780.

It is an arithmetic number, because the mean of its divisors is an integer number (9024577780).

Almost surely, 2^18049155559 is an apocalyptic number.

18049155559 is a deficient number, since it is larger than the sum of its proper divisors (1).

18049155559 is an equidigital number, since it uses as much as digits as its factorization.

18049155559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620000, while the sum is 52.

The spelling of 18049155559 in words is "eighteen billion, forty-nine million, one hundred fifty-five thousand, five hundred fifty-nine".