71057047591 has 2 divisors, whose sum is σ = 71057047592. Its totient is φ = 71057047590.

The previous prime is 71057047553. The next prime is 71057047631. The reversal of 71057047591 is 19574075017.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71057047591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71057047531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35528523795 + 35528523796.

It is an arithmetic number, because the mean of its divisors is an integer number (35528523796).

Almost surely, 2^71057047591 is an apocalyptic number.

71057047591 is a deficient number, since it is larger than the sum of its proper divisors (1).

71057047591 is an equidigital number, since it uses as much as digits as its factorization.

71057047591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 308700, while the sum is 46.

The spelling of 71057047591 in words is "seventy-one billion, fifty-seven million, forty-seven thousand, five hundred ninety-one".