12659159509 has 4 divisors (see below), whose sum is σ = 12667281120. Its totient is φ = 12651037900.

The previous prime is 12659159453. The next prime is 12659159519. The reversal of 12659159509 is 90595195621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12659159509 - 2⁹ = 12659158997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12659159519) 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, 4058467 + ... + 4061584.

It is an arithmetic number, because the mean of its divisors is an integer number (3166820280).

Almost surely, 2^12659159509 is an apocalyptic number.

It is an amenable number.

12659159509 is a deficient number, since it is larger than the sum of its proper divisors (8121611).

12659159509 is an equidigital number, since it uses as much as digits as its factorization.

12659159509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8121610.

The product of its (nonzero) digits is 1093500, while the sum is 52.

The spelling of 12659159509 in words is "twelve billion, six hundred fifty-nine million, one hundred fifty-nine thousand, five hundred nine".