71027451157717 has 2 divisors, whose sum is σ = 71027451157718. Its totient is φ = 71027451157716.

The previous prime is 71027451157673. The next prime is 71027451157727. The reversal of 71027451157717 is 71775115472017.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56124654906321 + 14902796251396 = 7491639^2 + 3860414^2 .

It is a cyclic number.

It is not a de Polignac number, because 71027451157717 - 2¹⁹ = 71027450633429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71027451157727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35513725578858 + 35513725578859.

It is an arithmetic number, because the mean of its divisors is an integer number (35513725578859).

Almost surely, 2^{71027451157717} is an apocalyptic number.

It is an amenable number.

71027451157717 is a deficient number, since it is larger than the sum of its proper divisors (1).

71027451157717 is an equidigital number, since it uses as much as digits as its factorization.

71027451157717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3361400, while the sum is 55.

The spelling of 71027451157717 in words is "seventy-one trillion, twenty-seven billion, four hundred fifty-one million, one hundred fifty-seven thousand, seven hundred seventeen".