18558060509 has 8 divisors (see below), whose sum is σ = 19208707320. Its totient is φ = 17908128000.

The previous prime is 18558060487. The next prime is 18558060517. The reversal of 18558060509 is 90506085581.

It can be written as a sum of positive squares in 4 ways, for example, as 4723125625 + 13834934884 = 68725^2 + 117622^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18558060509 - 2⁸ = 18558060253 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 (18558060569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125432 + ... + 229889.

It is an arithmetic number, because the mean of its divisors is an integer number (2401088415).

Almost surely, 2^18558060509 is an apocalyptic number.

It is an amenable number.

18558060509 is a deficient number, since it is larger than the sum of its proper divisors (650646811).

18558060509 is a wasteful number, since it uses less digits than its factorization.

18558060509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357151.

The product of its (nonzero) digits is 432000, while the sum is 47.

The spelling of 18558060509 in words is "eighteen billion, five hundred fifty-eight million, sixty thousand, five hundred nine".