71855443144129 has 2 divisors, whose sum is σ = 71855443144130. Its totient is φ = 71855443144128.

The previous prime is 71855443144073. The next prime is 71855443144159. The reversal of 71855443144129 is 92144134455817.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71748692611600 + 106750532529 = 8470460^2 + 326727^2 .

It is an emirp because it is prime and its reverse (92144134455817) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71855443144129 - 2²⁵ = 71855409589697 is a prime.

It is not a weakly prime, because it can be changed into another prime (71855443144159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35927721572064 + 35927721572065.

It is an arithmetic number, because the mean of its divisors is an integer number (35927721572065).

Almost surely, 2^{71855443144129} is an apocalyptic number.

It is an amenable number.

71855443144129 is a deficient number, since it is larger than the sum of its proper divisors (1).

71855443144129 is an equidigital number, since it uses as much as digits as its factorization.

71855443144129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19353600, while the sum is 58.

The spelling of 71855443144129 in words is "seventy-one trillion, eight hundred fifty-five billion, four hundred forty-three million, one hundred forty-four thousand, one hundred twenty-nine".