12566603031311 has 4 divisors (see below), whose sum is σ = 14361832035792. Its totient is φ = 10771374026832.

The previous prime is 12566603031233. The next prime is 12566603031383. The reversal of 12566603031311 is 11313030666521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12566603031311 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 (12566603031211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 897614502230 + ... + 897614502243.

It is an arithmetic number, because the mean of its divisors is an integer number (3590458008948).

Almost surely, 2^{12566603031311} is an apocalyptic number.

12566603031311 is a deficient number, since it is larger than the sum of its proper divisors (1795229004481).

12566603031311 is an equidigital number, since it uses as much as digits as its factorization.

12566603031311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795229004480.

The product of its (nonzero) digits is 58320, while the sum is 38.

Adding to 12566603031311 its reverse (11313030666521), we get a palindrome (23879633697832).

The spelling of 12566603031311 in words is "twelve trillion, five hundred sixty-six billion, six hundred three million, thirty-one thousand, three hundred eleven".