71945909398093 has 2 divisors, whose sum is σ = 71945909398094. Its totient is φ = 71945909398092.

The previous prime is 71945909398087. The next prime is 71945909398127. The reversal of 71945909398093 is 39089390954917.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68685855262249 + 3260054135844 = 8287693^2 + 1805562^2 .

It is an emirp because it is prime and its reverse (39089390954917) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71945909398093 - 2⁴¹ = 69746886142541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71945909398063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35972954699046 + 35972954699047.

It is an arithmetic number, because the mean of its divisors is an integer number (35972954699047).

Almost surely, 2^{71945909398093} is an apocalyptic number.

It is an amenable number.

71945909398093 is a deficient number, since it is larger than the sum of its proper divisors (1).

71945909398093 is an equidigital number, since it uses as much as digits as its factorization.

71945909398093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 595213920, while the sum is 76.

The spelling of 71945909398093 in words is "seventy-one trillion, nine hundred forty-five billion, nine hundred nine million, three hundred ninety-eight thousand, ninety-three".