12159686261 has 4 divisors (see below), whose sum is σ = 12204556224. Its totient is φ = 12114816300.

The previous prime is 12159686251. The next prime is 12159686269. The reversal of 12159686261 is 16268695121.

12159686261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12159686261 - 2⁶ = 12159686197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12159686269) 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 in 3 ways as a sum of consecutive naturals, for example, 22434575 + ... + 22435116.

It is an arithmetic number, because the mean of its divisors is an integer number (3051139056).

Almost surely, 2^12159686261 is an apocalyptic number.

It is an amenable number.

12159686261 is a deficient number, since it is larger than the sum of its proper divisors (44869963).

12159686261 is an equidigital number, since it uses as much as digits as its factorization.

12159686261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44869962.

The product of its digits is 311040, while the sum is 47.

The spelling of 12159686261 in words is "twelve billion, one hundred fifty-nine million, six hundred eighty-six thousand, two hundred sixty-one".