12818554559 has 4 divisors (see below), whose sum is σ = 12950704704. Its totient is φ = 12686404416.

The previous prime is 12818554547. The next prime is 12818554561. The reversal of 12818554559 is 95545581821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95545581821 = 7159 ⋅13346219.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12818554559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12818554559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12811554559) 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, 66074927 + ... + 66075120.

It is an arithmetic number, because the mean of its divisors is an integer number (3237676176).

Almost surely, 2^12818554559 is an apocalyptic number.

12818554559 is a deficient number, since it is larger than the sum of its proper divisors (132150145).

12818554559 is an equidigital number, since it uses as much as digits as its factorization.

12818554559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132150144.

The product of its digits is 2880000, while the sum is 53.

The spelling of 12818554559 in words is "twelve billion, eight hundred eighteen million, five hundred fifty-four thousand, five hundred fifty-nine".