12565289027 has 2 divisors, whose sum is σ = 12565289028. Its totient is φ = 12565289026.

The previous prime is 12565289003. The next prime is 12565289053. The reversal of 12565289027 is 72098256521.

It is a happy number.

12565289027 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12565289027 - 2¹⁰ = 12565288003 is a prime.

It is not a weakly prime, because it can be changed into another prime (12565288027) 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, 6282644513 + 6282644514.

It is an arithmetic number, because the mean of its divisors is an integer number (6282644514).

Almost surely, 2^12565289027 is an apocalyptic number.

12565289027 is a deficient number, since it is larger than the sum of its proper divisors (1).

12565289027 is an equidigital number, since it uses as much as digits as its factorization.

12565289027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 12565289027 in words is "twelve billion, five hundred sixty-five million, two hundred eighty-nine thousand, twenty-seven".