12555955589 has 2 divisors, whose sum is σ = 12555955590. Its totient is φ = 12555955588.

The previous prime is 12555955567. The next prime is 12555955597. The reversal of 12555955589 is 98555955521.

12555955589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11154950689 + 1401004900 = 105617^2 + 37430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12555955589 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12555951589) 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 as a sum of consecutive naturals, namely, 6277977794 + 6277977795.

It is an arithmetic number, because the mean of its divisors is an integer number (6277977795).

Almost surely, 2^12555955589 is an apocalyptic number.

It is an amenable number.

12555955589 is a deficient number, since it is larger than the sum of its proper divisors (1).

12555955589 is an equidigital number, since it uses as much as digits as its factorization.

12555955589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20250000, while the sum is 59.

The spelling of 12555955589 in words is "twelve billion, five hundred fifty-five million, nine hundred fifty-five thousand, five hundred eighty-nine".