28027561311979 has 2 divisors, whose sum is σ = 28027561311980. Its totient is φ = 28027561311978.

The previous prime is 28027561311913. The next prime is 28027561312027. The reversal of 28027561311979 is 97911316572082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28027561311979 - 2⁷ = 28027561311851 is a prime.

It is not a weakly prime, because it can be changed into another prime (28027561311179) 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, 14013780655989 + 14013780655990.

It is an arithmetic number, because the mean of its divisors is an integer number (14013780655990).

Almost surely, 2^{28027561311979} is an apocalyptic number.

28027561311979 is a deficient number, since it is larger than the sum of its proper divisors (1).

28027561311979 is an equidigital number, since it uses as much as digits as its factorization.

28027561311979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11430720, while the sum is 61.

The spelling of 28027561311979 in words is "twenty-eight trillion, twenty-seven billion, five hundred sixty-one million, three hundred eleven thousand, nine hundred seventy-nine".