12156644311 has 16 divisors (see below), whose sum is σ = 14130984448. Its totient is φ = 10241964000.

The previous prime is 12156644263. The next prime is 12156644317. The reversal of 12156644311 is 11344665121.

It is a cyclic number.

It is not a de Polignac number, because 12156644311 - 2²⁷ = 12022426583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12156644317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 649636 + ... + 668086.

It is an arithmetic number, because the mean of its divisors is an integer number (883186528).

Almost surely, 2^12156644311 is an apocalyptic number.

12156644311 is a deficient number, since it is larger than the sum of its proper divisors (1974340137).

12156644311 is a wasteful number, since it uses less digits than its factorization.

12156644311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20062.

The product of its digits is 17280, while the sum is 34.

The spelling of 12156644311 in words is "twelve billion, one hundred fifty-six million, six hundred forty-four thousand, three hundred eleven".