12195840471847 has 2 divisors, whose sum is σ = 12195840471848. Its totient is φ = 12195840471846.

The previous prime is 12195840471833. The next prime is 12195840471853. The reversal of 12195840471847 is 74817404859121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12195840471847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12195840471547) 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, 6097920235923 + 6097920235924.

It is an arithmetic number, because the mean of its divisors is an integer number (6097920235924).

Almost surely, 2^{12195840471847} is an apocalyptic number.

12195840471847 is a deficient number, since it is larger than the sum of its proper divisors (1).

12195840471847 is an equidigital number, since it uses as much as digits as its factorization.

12195840471847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18063360, while the sum is 61.

The spelling of 12195840471847 in words is "twelve trillion, one hundred ninety-five billion, eight hundred forty million, four hundred seventy-one thousand, eight hundred forty-seven".