71395859317 has 4 divisors (see below), whose sum is σ = 71399605356. Its totient is φ = 71392113280.

The previous prime is 71395859299. The next prime is 71395859321.

71395859317 is nontrivially palindromic in base 10.

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 18009908401 + 53385950916 = 134201^2 + 231054^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71395859317 is a prime.

It is a super-2 number, since 2×71395859317² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71395859357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1844284 + ... + 1882597.

It is an arithmetic number, because the mean of its divisors is an integer number (17849901339).

Almost surely, 2^71395859317 is an apocalyptic number.

It is an amenable number.

71395859317 is a deficient number, since it is larger than the sum of its proper divisors (3746039).

71395859317 is a wasteful number, since it uses less digits than its factorization.

71395859317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3746038.

The product of its digits is 7144200, while the sum is 58.

The spelling of 71395859317 in words is "seventy-one billion, three hundred ninety-five million, eight hundred fifty-nine thousand, three hundred seventeen".