28056288613 has 2 divisors, whose sum is σ = 28056288614. Its totient is φ = 28056288612.

The previous prime is 28056288599. The next prime is 28056288629. The reversal of 28056288613 is 31688265082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16931734884 + 11124553729 = 130122^2 + 105473^2 .

It is a cyclic number.

It is not a de Polignac number, because 28056288613 - 2⁵ = 28056288581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28056288653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14028144306 + 14028144307.

It is an arithmetic number, because the mean of its divisors is an integer number (14028144307).

Almost surely, 2^28056288613 is an apocalyptic number.

It is an amenable number.

28056288613 is a deficient number, since it is larger than the sum of its proper divisors (1).

28056288613 is an equidigital number, since it uses as much as digits as its factorization.

28056288613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1105920, while the sum is 49.

The spelling of 28056288613 in words is "twenty-eight billion, fifty-six million, two hundred eighty-eight thousand, six hundred thirteen".