28027561311613 has 2 divisors, whose sum is σ = 28027561311614. Its totient is φ = 28027561311612.

The previous prime is 28027561311593. The next prime is 28027561311643. The reversal of 28027561311613 is 31611316572082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27844217204644 + 183344106969 = 5276762^2 + 428187^2 .

It is a cyclic number.

It is not a de Polignac number, because 28027561311613 - 2²⁵ = 28027527757181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28027561311643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14013780655806 + 14013780655807.

It is an arithmetic number, because the mean of its divisors is an integer number (14013780655807).

Almost surely, 2^{28027561311613} is an apocalyptic number.

It is an amenable number.

28027561311613 is a deficient number, since it is larger than the sum of its proper divisors (1).

28027561311613 is an equidigital number, since it uses as much as digits as its factorization.

28027561311613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 46.

Adding to 28027561311613 its reverse (31611316572082), we get a palindrome (59638877883695).

The spelling of 28027561311613 in words is "twenty-eight trillion, twenty-seven billion, five hundred sixty-one million, three hundred eleven thousand, six hundred thirteen".