12566565011 has 16 divisors (see below), whose sum is σ = 16872592128. Its totient is φ = 9038887200.

The previous prime is 12566564999. The next prime is 12566565013. The reversal of 12566565011 is 11056566521.

It is a happy number.

It is not a de Polignac number, because 12566565011 - 2³⁰ = 11492823187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12566565013) 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, 6276005 + ... + 6278006.

It is an arithmetic number, because the mean of its divisors is an integer number (1054537008).

Almost surely, 2^12566565011 is an apocalyptic number.

12566565011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12566565011 is a deficient number, since it is larger than the sum of its proper divisors (4306027117).

12566565011 is a wasteful number, since it uses less digits than its factorization.

12566565011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12554042.

The product of its (nonzero) digits is 54000, while the sum is 38.

The spelling of 12566565011 in words is "twelve billion, five hundred sixty-six million, five hundred sixty-five thousand, eleven".