71731408841 has 2 divisors, whose sum is σ = 71731408842. Its totient is φ = 71731408840.

The previous prime is 71731408831. The next prime is 71731408913. The reversal of 71731408841 is 14880413717.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50308695616 + 21422713225 = 224296^2 + 146365^2 .

It is a cyclic number.

It is not a de Polignac number, because 71731408841 - 2¹⁴ = 71731392457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71731408792 and 71731408801.

It is not a weakly prime, because it can be changed into another prime (71731408831) 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, 35865704420 + 35865704421.

It is an arithmetic number, because the mean of its divisors is an integer number (35865704421).

Almost surely, 2^71731408841 is an apocalyptic number.

It is an amenable number.

71731408841 is a deficient number, since it is larger than the sum of its proper divisors (1).

71731408841 is an equidigital number, since it uses as much as digits as its factorization.

71731408841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150528, while the sum is 44.

The spelling of 71731408841 in words is "seventy-one billion, seven hundred thirty-one million, four hundred eight thousand, eight hundred forty-one".