71678388787727 has 2 divisors, whose sum is σ = 71678388787728. Its totient is φ = 71678388787726.

The previous prime is 71678388787711. The next prime is 71678388787987. The reversal of 71678388787727 is 72778788387617.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71678388787727 - 2⁴ = 71678388787711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71678388787127) 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, 35839194393863 + 35839194393864.

It is an arithmetic number, because the mean of its divisors is an integer number (35839194393864).

Almost surely, 2^{71678388787727} is an apocalyptic number.

71678388787727 is a deficient number, since it is larger than the sum of its proper divisors (1).

71678388787727 is an equidigital number, since it uses as much as digits as its factorization.

71678388787727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17348050944, while the sum is 86.

The spelling of 71678388787727 in words is "seventy-one trillion, six hundred seventy-eight billion, three hundred eighty-eight million, seven hundred eighty-seven thousand, seven hundred twenty-seven".