27889771417 has 2 divisors, whose sum is σ = 27889771418. Its totient is φ = 27889771416.

The previous prime is 27889771367. The next prime is 27889771439. The reversal of 27889771417 is 71417798872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24490998016 + 3398773401 = 156496^2 + 58299^2 .

It is a cyclic number.

It is not a de Polignac number, because 27889771417 - 2⁷ = 27889771289 is a prime.

It is not a weakly prime, because it can be changed into another prime (27889771487) 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, 13944885708 + 13944885709.

It is an arithmetic number, because the mean of its divisors is an integer number (13944885709).

Almost surely, 2^27889771417 is an apocalyptic number.

It is an amenable number.

27889771417 is a deficient number, since it is larger than the sum of its proper divisors (1).

27889771417 is an equidigital number, since it uses as much as digits as its factorization.

27889771417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11063808, while the sum is 61.

The spelling of 27889771417 in words is "twenty-seven billion, eight hundred eighty-nine million, seven hundred seventy-one thousand, four hundred seventeen".