27868271677 has 2 divisors, whose sum is σ = 27868271678. Its totient is φ = 27868271676.

The previous prime is 27868271611. The next prime is 27868271689. The reversal of 27868271677 is 77617286872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27735238521 + 133033156 = 166539^2 + 11534^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27868271677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27868271077) 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, 13934135838 + 13934135839.

It is an arithmetic number, because the mean of its divisors is an integer number (13934135839).

Almost surely, 2^27868271677 is an apocalyptic number.

It is an amenable number.

27868271677 is a deficient number, since it is larger than the sum of its proper divisors (1).

27868271677 is an equidigital number, since it uses as much as digits as its factorization.

27868271677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22127616, while the sum is 61.

The spelling of 27868271677 in words is "twenty-seven billion, eight hundred sixty-eight million, two hundred seventy-one thousand, six hundred seventy-seven".