71195491791 has 6 divisors (see below), whose sum is σ = 102837932600. Its totient is φ = 47463661188.

The previous prime is 71195491781. The next prime is 71195491867. The reversal of 71195491791 is 19719459117.

It is a happy number.

71195491791 is a `hidden beast` number, since 7 + 1 + 1 + 9 + 549 + 1 + 7 + 91 = 666.

It is not a de Polignac number, because 71195491791 - 2⁶ = 71195491727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71195491781) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3955305091 + ... + 3955305108.

Almost surely, 2^71195491791 is an apocalyptic number.

71195491791 is a deficient number, since it is larger than the sum of its proper divisors (31642440809).

71195491791 is a wasteful number, since it uses less digits than its factorization.

71195491791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7910610205 (or 7910610202 counting only the distinct ones).

The product of its digits is 714420, while the sum is 54.

The spelling of 71195491791 in words is "seventy-one billion, one hundred ninety-five million, four hundred ninety-one thousand, seven hundred ninety-one".