195143442127 has 2 divisors, whose sum is σ = 195143442128. Its totient is φ = 195143442126.

The previous prime is 195143442103. The next prime is 195143442161. The reversal of 195143442127 is 721244341591.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195143442127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195143442427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97571721063 + 97571721064.

It is an arithmetic number, because the mean of its divisors is an integer number (97571721064).

Almost surely, 2^195143442127 is an apocalyptic number.

195143442127 is a deficient number, since it is larger than the sum of its proper divisors (1).

195143442127 is an equidigital number, since it uses as much as digits as its factorization.

195143442127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 43.

The spelling of 195143442127 in words is "one hundred ninety-five billion, one hundred forty-three million, four hundred forty-two thousand, one hundred twenty-seven".