27012345671 has 2 divisors, whose sum is σ = 27012345672. Its totient is φ = 27012345670.

The previous prime is 27012345641. The next prime is 27012345677. The reversal of 27012345671 is 17654321072.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27012345671 - 2¹⁰ = 27012344647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27012345677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13506172835 + 13506172836.

It is an arithmetic number, because the mean of its divisors is an integer number (13506172836).

Almost surely, 2^27012345671 is an apocalyptic number.

27012345671 is a deficient number, since it is larger than the sum of its proper divisors (1).

27012345671 is an equidigital number, since it uses as much as digits as its factorization.

27012345671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 38.

The spelling of 27012345671 in words is "twenty-seven billion, twelve million, three hundred forty-five thousand, six hundred seventy-one".