12540636113 has 2 divisors, whose sum is σ = 12540636114. Its totient is φ = 12540636112.

The previous prime is 12540636089. The next prime is 12540636131. The reversal of 12540636113 is 31163604521.

Together with next prime (12540636131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10998346129 + 1542289984 = 104873^2 + 39272^2 .

It is a cyclic number.

It is not a de Polignac number, because 12540636113 - 2³² = 8245668817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12540636113.

It is not a weakly prime, because it can be changed into another prime (12540636413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6270318056 + 6270318057.

It is an arithmetic number, because the mean of its divisors is an integer number (6270318057).

Almost surely, 2^12540636113 is an apocalyptic number.

It is an amenable number.

12540636113 is a deficient number, since it is larger than the sum of its proper divisors (1).

12540636113 is an equidigital number, since it uses as much as digits as its factorization.

12540636113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 12540636113 in words is "twelve billion, five hundred forty million, six hundred thirty-six thousand, one hundred thirteen".