28112635249 has 2 divisors, whose sum is σ = 28112635250. Its totient is φ = 28112635248.

The previous prime is 28112635219. The next prime is 28112635301. The reversal of 28112635249 is 94253621182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26384154624 + 1728480625 = 162432^2 + 41575^2 .

It is a cyclic number.

It is not a de Polignac number, because 28112635249 - 2²¹ = 28110538097 is a prime.

It is not a weakly prime, because it can be changed into another prime (28112635219) 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, 14056317624 + 14056317625.

It is an arithmetic number, because the mean of its divisors is an integer number (14056317625).

Almost surely, 2^28112635249 is an apocalyptic number.

It is an amenable number.

28112635249 is a deficient number, since it is larger than the sum of its proper divisors (1).

28112635249 is an equidigital number, since it uses as much as digits as its factorization.

28112635249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 43.

The spelling of 28112635249 in words is "twenty-eight billion, one hundred twelve million, six hundred thirty-five thousand, two hundred forty-nine".