27681122047 has 2 divisors, whose sum is σ = 27681122048. Its totient is φ = 27681122046.

The previous prime is 27681122041. The next prime is 27681122087. The reversal of 27681122047 is 74022118672.

It is an a-pointer prime, because the next prime (27681122087) can be obtained adding 27681122047 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27681122047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27681122041) 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, 13840561023 + 13840561024.

It is an arithmetic number, because the mean of its divisors is an integer number (13840561024).

Almost surely, 2^27681122047 is an apocalyptic number.

27681122047 is a deficient number, since it is larger than the sum of its proper divisors (1).

27681122047 is an equidigital number, since it uses as much as digits as its factorization.

27681122047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75264, while the sum is 40.

The spelling of 27681122047 in words is "twenty-seven billion, six hundred eighty-one million, one hundred twenty-two thousand, forty-seven".