71057791 has 12 divisors (see below), whose sum is σ = 82880280. Its totient is φ = 60743760.

The previous prime is 71057761. The next prime is 71057803. The reversal of 71057791 is 19775017.

It is not a de Polignac number, because 71057791 - 2⁵ = 71057759 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71057791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71057761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18801 + ... + 22261.

It is an arithmetic number, because the mean of its divisors is an integer number (6906690).

Almost surely, 2^71057791 is an apocalyptic number.

71057791 is a deficient number, since it is larger than the sum of its proper divisors (11822489).

71057791 is a wasteful number, since it uses less digits than its factorization.

71057791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3894 (or 3887 counting only the distinct ones).

The product of its (nonzero) digits is 15435, while the sum is 37.

The square root of 71057791 is about 8429.5783405815. The cubic root of 71057791 is about 414.1940928299.

The spelling of 71057791 in words is "seventy-one million, fifty-seven thousand, seven hundred ninety-one".