12566634385111 has 2 divisors, whose sum is σ = 12566634385112. Its totient is φ = 12566634385110.

The previous prime is 12566634385093. The next prime is 12566634385139. The reversal of 12566634385111 is 11158343666521.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12566634385111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12566634385141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6283317192555 + 6283317192556.

It is an arithmetic number, because the mean of its divisors is an integer number (6283317192556).

Almost surely, 2^{12566634385111} is an apocalyptic number.

12566634385111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12566634385111 is an equidigital number, since it uses as much as digits as its factorization.

12566634385111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3110400, while the sum is 52.

The spelling of 12566634385111 in words is "twelve trillion, five hundred sixty-six billion, six hundred thirty-four million, three hundred eighty-five thousand, one hundred eleven".