12847704291991 has 2 divisors, whose sum is σ = 12847704291992. Its totient is φ = 12847704291990.

The previous prime is 12847704291977. The next prime is 12847704291997. The reversal of 12847704291991 is 19919240774821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12847704291991 - 2¹¹ = 12847704289943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12847704291997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6423852145995 + 6423852145996.

It is an arithmetic number, because the mean of its divisors is an integer number (6423852145996).

Almost surely, 2^{12847704291991} is an apocalyptic number.

12847704291991 is a deficient number, since it is larger than the sum of its proper divisors (1).

12847704291991 is an equidigital number, since it uses as much as digits as its factorization.

12847704291991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18289152, while the sum is 64.

The spelling of 12847704291991 in words is "twelve trillion, eight hundred forty-seven billion, seven hundred four million, two hundred ninety-one thousand, nine hundred ninety-one".