28327742278229 has 2 divisors, whose sum is σ = 28327742278230. Its totient is φ = 28327742278228.

The previous prime is 28327742278193. The next prime is 28327742278243. The reversal of 28327742278229 is 92287224772382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28326824067025 + 918211204 = 5322295^2 + 30302^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28327742278229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28327742271229) 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, 14163871139114 + 14163871139115.

It is an arithmetic number, because the mean of its divisors is an integer number (14163871139115).

Almost surely, 2^{28327742278229} is an apocalyptic number.

It is an amenable number.

28327742278229 is a deficient number, since it is larger than the sum of its proper divisors (1).

28327742278229 is an equidigital number, since it uses as much as digits as its factorization.

28327742278229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151732224, while the sum is 65.

The spelling of 28327742278229 in words is "twenty-eight trillion, three hundred twenty-seven billion, seven hundred forty-two million, two hundred seventy-eight thousand, two hundred twenty-nine".