28553885209 has 2 divisors, whose sum is σ = 28553885210. Its totient is φ = 28553885208.

The previous prime is 28553885153. The next prime is 28553885291. The reversal of 28553885209 is 90258835582.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16416015625 + 12137869584 = 128125^2 + 110172^2 .

It is a cyclic number.

It is not a de Polignac number, because 28553885209 - 2¹⁹ = 28553360921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28553885209.

It is not a weakly prime, because it can be changed into another prime (28553885609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14276942604 + 14276942605.

It is an arithmetic number, because the mean of its divisors is an integer number (14276942605).

Almost surely, 2^28553885209 is an apocalyptic number.

It is an amenable number.

28553885209 is a deficient number, since it is larger than the sum of its proper divisors (1).

28553885209 is an equidigital number, since it uses as much as digits as its factorization.

28553885209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912000, while the sum is 55.

The spelling of 28553885209 in words is "twenty-eight billion, five hundred fifty-three million, eight hundred eighty-five thousand, two hundred nine".