71013985597 has 4 divisors (see below), whose sum is σ = 71020578460. Its totient is φ = 71007392736.

The previous prime is 71013985541. The next prime is 71013985619. The reversal of 71013985597 is 79558931017.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52454282841 + 18559702756 = 229029^2 + 136234^2 .

It is a cyclic number.

It is not a de Polignac number, because 71013985597 - 2¹⁵ = 71013952829 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 (71013985397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3280248 + ... + 3301825.

It is an arithmetic number, because the mean of its divisors is an integer number (17755144615).

Almost surely, 2^71013985597 is an apocalyptic number.

It is an amenable number.

71013985597 is a deficient number, since it is larger than the sum of its proper divisors (6592863).

71013985597 is a wasteful number, since it uses less digits than its factorization.

71013985597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6592862.

The product of its (nonzero) digits is 2381400, while the sum is 55.

The spelling of 71013985597 in words is "seventy-one billion, thirteen million, nine hundred eighty-five thousand, five hundred ninety-seven".