12558610468321 has 4 divisors (see below), whose sum is σ = 12610720885444. Its totient is φ = 12506500051200.

The previous prime is 12558610468279. The next prime is 12558610468421. The reversal of 12558610468321 is 12386401685521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9573386739921 + 2985223728400 = 3094089^2 + 1727780^2 .

It is a cyclic number.

It is not a de Polignac number, because 12558610468321 - 2¹¹ = 12558610466273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12558610468421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26055208200 + ... + 26055208681.

It is an arithmetic number, because the mean of its divisors is an integer number (3152680221361).

Almost surely, 2^{12558610468321} is an apocalyptic number.

It is an amenable number.

12558610468321 is a deficient number, since it is larger than the sum of its proper divisors (52110417123).

12558610468321 is an equidigital number, since it uses as much as digits as its factorization.

12558610468321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52110417122.

The product of its (nonzero) digits is 2764800, while the sum is 52.

The spelling of 12558610468321 in words is "twelve trillion, five hundred fifty-eight billion, six hundred ten million, four hundred sixty-eight thousand, three hundred twenty-one".