27747521911 has 2 divisors, whose sum is σ = 27747521912. Its totient is φ = 27747521910.

The previous prime is 27747521909. The next prime is 27747521933. The reversal of 27747521911 is 11912574772.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27747521911 - 2¹ = 27747521909 is a prime.

Together with 27747521909, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27747561911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13873760955 + 13873760956.

It is an arithmetic number, because the mean of its divisors is an integer number (13873760956).

Almost surely, 2^27747521911 is an apocalyptic number.

27747521911 is a deficient number, since it is larger than the sum of its proper divisors (1).

27747521911 is an equidigital number, since it uses as much as digits as its factorization.

27747521911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 246960, while the sum is 46.

The spelling of 27747521911 in words is "twenty-seven billion, seven hundred forty-seven million, five hundred twenty-one thousand, nine hundred eleven".