27771641087 has 2 divisors, whose sum is σ = 27771641088. Its totient is φ = 27771641086.

The previous prime is 27771641083. The next prime is 27771641089. The reversal of 27771641087 is 78014617772.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27771641087 - 2² = 27771641083 is a prime.

Together with 27771641089, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27771641083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13885820543 + 13885820544.

It is an arithmetic number, because the mean of its divisors is an integer number (13885820544).

Almost surely, 2^27771641087 is an apocalyptic number.

27771641087 is a deficient number, since it is larger than the sum of its proper divisors (1).

27771641087 is an equidigital number, since it uses as much as digits as its factorization.

27771641087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 921984, while the sum is 50.

The spelling of 27771641087 in words is "twenty-seven billion, seven hundred seventy-one million, six hundred forty-one thousand, eighty-seven".