28185696013 has 2 divisors, whose sum is σ = 28185696014. Its totient is φ = 28185696012.

The previous prime is 28185695987. The next prime is 28185696047. The reversal of 28185696013 is 31069658182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25703464329 + 2482231684 = 160323^2 + 49822^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28185696013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28185696073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14092848006 + 14092848007.

It is an arithmetic number, because the mean of its divisors is an integer number (14092848007).

Almost surely, 2^28185696013 is an apocalyptic number.

It is an amenable number.

28185696013 is a deficient number, since it is larger than the sum of its proper divisors (1).

28185696013 is an equidigital number, since it uses as much as digits as its factorization.

28185696013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 28185696013 in words is "twenty-eight billion, one hundred eighty-five million, six hundred ninety-six thousand, thirteen".