28327830525809 has 2 divisors, whose sum is σ = 28327830525810. Its totient is φ = 28327830525808.

The previous prime is 28327830525739. The next prime is 28327830525817. The reversal of 28327830525809 is 90852503872382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16852437149584 + 11475393376225 = 4105172^2 + 3387535^2 .

It is a cyclic number.

It is not a de Polignac number, because 28327830525809 - 2²⁸ = 28327562090353 is a prime.

It is not a weakly prime, because it can be changed into another prime (28327830524809) 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, 14163915262904 + 14163915262905.

It is an arithmetic number, because the mean of its divisors is an integer number (14163915262905).

Almost surely, 2^{28327830525809} is an apocalyptic number.

It is an amenable number.

28327830525809 is a deficient number, since it is larger than the sum of its proper divisors (1).

28327830525809 is an equidigital number, since it uses as much as digits as its factorization.

28327830525809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58060800, while the sum is 62.

The spelling of 28327830525809 in words is "twenty-eight trillion, three hundred twenty-seven billion, eight hundred thirty million, five hundred twenty-five thousand, eight hundred nine".