12534256109 has 2 divisors, whose sum is σ = 12534256110. Its totient is φ = 12534256108.

The previous prime is 12534256103. The next prime is 12534256117. The reversal of 12534256109 is 90165243521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12533922025 + 334084 = 111955^2 + 578^2 .

It is a cyclic number.

It is not a de Polignac number, because 12534256109 - 2¹⁶ = 12534190573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12534256103) 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 as a sum of consecutive naturals, namely, 6267128054 + 6267128055.

It is an arithmetic number, because the mean of its divisors is an integer number (6267128055).

Almost surely, 2^12534256109 is an apocalyptic number.

It is an amenable number.

12534256109 is a deficient number, since it is larger than the sum of its proper divisors (1).

12534256109 is an equidigital number, since it uses as much as digits as its factorization.

12534256109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 12534256109 in words is "twelve billion, five hundred thirty-four million, two hundred fifty-six thousand, one hundred nine".