28056444613 has 2 divisors, whose sum is σ = 28056444614. Its totient is φ = 28056444612.

The previous prime is 28056444593. The next prime is 28056444629. The reversal of 28056444613 is 31644465082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24466277889 + 3590166724 = 156417^2 + 59918^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28056444613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28056444613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28056444643) 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, 14028222306 + 14028222307.

It is an arithmetic number, because the mean of its divisors is an integer number (14028222307).

Almost surely, 2^28056444613 is an apocalyptic number.

It is an amenable number.

28056444613 is a deficient number, since it is larger than the sum of its proper divisors (1).

28056444613 is an equidigital number, since it uses as much as digits as its factorization.

28056444613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 552960, while the sum is 43.

The spelling of 28056444613 in words is "twenty-eight billion, fifty-six million, four hundred forty-four thousand, six hundred thirteen".