18276589440609 has 4 divisors (see below), whose sum is σ = 24368785920816. Its totient is φ = 12184392960404.

The previous prime is 18276589440587. The next prime is 18276589440677. The reversal of 18276589440609 is 90604498567281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18276589440609 - 2¹² = 18276589436513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18276589440709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3046098240099 + ... + 3046098240104.

It is an arithmetic number, because the mean of its divisors is an integer number (6092196480204).

Almost surely, 2^{18276589440609} is an apocalyptic number.

It is an amenable number.

18276589440609 is a deficient number, since it is larger than the sum of its proper divisors (6092196480207).

18276589440609 is an equidigital number, since it uses as much as digits as its factorization.

18276589440609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6092196480206.

The product of its (nonzero) digits is 209018880, while the sum is 69.

The spelling of 18276589440609 in words is "eighteen trillion, two hundred seventy-six billion, five hundred eighty-nine million, four hundred forty thousand, six hundred nine".