71671505071 has 2 divisors, whose sum is σ = 71671505072. Its totient is φ = 71671505070.

The previous prime is 71671505057. The next prime is 71671505089. The reversal of 71671505071 is 17050517617.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71671505071 - 2¹¹ = 71671503023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71371505071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35835752535 + 35835752536.

It is an arithmetic number, because the mean of its divisors is an integer number (35835752536).

Almost surely, 2^71671505071 is an apocalyptic number.

71671505071 is a deficient number, since it is larger than the sum of its proper divisors (1).

71671505071 is an equidigital number, since it uses as much as digits as its factorization.

71671505071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51450, while the sum is 40.

The spelling of 71671505071 in words is "seventy-one billion, six hundred seventy-one million, five hundred five thousand, seventy-one".