129163247791 has 2 divisors, whose sum is σ = 129163247792. Its totient is φ = 129163247790.

The previous prime is 129163247777. The next prime is 129163247827. The reversal of 129163247791 is 197742361921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129163247791 - 2²¹ = 129161150639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129163247771) 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, 64581623895 + 64581623896.

It is an arithmetic number, because the mean of its divisors is an integer number (64581623896).

Almost surely, 2^129163247791 is an apocalyptic number.

129163247791 is a deficient number, since it is larger than the sum of its proper divisors (1).

129163247791 is an equidigital number, since it uses as much as digits as its factorization.

129163247791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 52.

The spelling of 129163247791 in words is "one hundred twenty-nine billion, one hundred sixty-three million, two hundred forty-seven thousand, seven hundred ninety-one".