27663241321 has 2 divisors, whose sum is σ = 27663241322. Its totient is φ = 27663241320.

The previous prime is 27663241267. The next prime is 27663241357. The reversal of 27663241321 is 12314236672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16138145296 + 11525096025 = 127036^2 + 107355^2 .

It is a cyclic number.

It is not a de Polignac number, because 27663241321 - 2¹⁵ = 27663208553 is a prime.

It is not a weakly prime, because it can be changed into another prime (27663241391) 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, 13831620660 + 13831620661.

It is an arithmetic number, because the mean of its divisors is an integer number (13831620661).

Almost surely, 2^27663241321 is an apocalyptic number.

It is an amenable number.

27663241321 is a deficient number, since it is larger than the sum of its proper divisors (1).

27663241321 is an equidigital number, since it uses as much as digits as its factorization.

27663241321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 37.

Adding to 27663241321 its reverse (12314236672), we get a palindrome (39977477993).

The spelling of 27663241321 in words is "twenty-seven billion, six hundred sixty-three million, two hundred forty-one thousand, three hundred twenty-one".