27806211047 has 2 divisors, whose sum is σ = 27806211048. Its totient is φ = 27806211046.

The previous prime is 27806210989. The next prime is 27806211049. The reversal of 27806211047 is 74011260872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27806211047 - 2⁶ = 27806210983 is a prime.

Together with 27806211049, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27806211047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27806211049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13903105523 + 13903105524.

It is an arithmetic number, because the mean of its divisors is an integer number (13903105524).

Almost surely, 2^27806211047 is an apocalyptic number.

27806211047 is a deficient number, since it is larger than the sum of its proper divisors (1).

27806211047 is an equidigital number, since it uses as much as digits as its factorization.

27806211047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 38.

The spelling of 27806211047 in words is "twenty-seven billion, eight hundred six million, two hundred eleven thousand, forty-seven".