27286827809 has 2 divisors, whose sum is σ = 27286827810. Its totient is φ = 27286827808.

The previous prime is 27286827793. The next prime is 27286827833. The reversal of 27286827809 is 90872868272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25176803584 + 2110024225 = 158672^2 + 45935^2 .

It is a cyclic number.

It is not a de Polignac number, because 27286827809 - 2⁴ = 27286827793 is a prime.

It is not a weakly prime, because it can be changed into another prime (27286827839) 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, 13643413904 + 13643413905.

It is an arithmetic number, because the mean of its divisors is an integer number (13643413905).

Almost surely, 2^27286827809 is an apocalyptic number.

It is an amenable number.

27286827809 is a deficient number, since it is larger than the sum of its proper divisors (1).

27286827809 is an equidigital number, since it uses as much as digits as its factorization.

27286827809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10838016, while the sum is 59.

The spelling of 27286827809 in words is "twenty-seven billion, two hundred eighty-six million, eight hundred twenty-seven thousand, eight hundred nine".