12665251289 has 4 divisors (see below), whose sum is σ = 12838747956. Its totient is φ = 12491754624.

The previous prime is 12665251223. The next prime is 12665251301. The reversal of 12665251289 is 98215256621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98215256621 = 29201 ⋅3363421.

It can be written as a sum of positive squares in 2 ways, for example, as 9100206025 + 3565045264 = 95395^2 + 59708^2 .

It is a cyclic number.

It is not a de Polignac number, because 12665251289 - 2²⁴ = 12648474073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12665259289) 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, 86748224 + ... + 86748369.

It is an arithmetic number, because the mean of its divisors is an integer number (3209686989).

Almost surely, 2^12665251289 is an apocalyptic number.

It is an amenable number.

12665251289 is a deficient number, since it is larger than the sum of its proper divisors (173496667).

12665251289 is an equidigital number, since it uses as much as digits as its factorization.

12665251289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173496666.

The product of its digits is 518400, while the sum is 47.

The spelling of 12665251289 in words is "twelve billion, six hundred sixty-five million, two hundred fifty-one thousand, two hundred eighty-nine".