71691103871 has 2 divisors, whose sum is σ = 71691103872. Its totient is φ = 71691103870.

The previous prime is 71691103859. The next prime is 71691103889. The reversal of 71691103871 is 17830119617.

It is a weak prime.

It is an emirp because it is prime and its reverse (17830119617) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71691103871 - 2¹⁸ = 71690841727 is a prime.

It is a super-2 number, since 2×71691103871² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71691103831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35845551935 + 35845551936.

It is an arithmetic number, because the mean of its divisors is an integer number (35845551936).

Almost surely, 2^71691103871 is an apocalyptic number.

71691103871 is a deficient number, since it is larger than the sum of its proper divisors (1).

71691103871 is an equidigital number, since it uses as much as digits as its factorization.

71691103871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 44.

The spelling of 71691103871 in words is "seventy-one billion, six hundred ninety-one million, one hundred three thousand, eight hundred seventy-one".