71391219317 has 12 divisors (see below), whose sum is σ = 78566108460. Its totient is φ = 64822728960.

The previous prime is 71391219293. The next prime is 71391219323.

71391219317 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 28506607921 + 42884611396 = 168839^2 + 207086^2 .

It is not a de Polignac number, because 71391219317 - 2¹² = 71391215221 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 (71391219377) 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, 255548 + ... + 456165.

It is an arithmetic number, because the mean of its divisors is an integer number (6547175705).

Almost surely, 2^71391219317 is an apocalyptic number.

It is an amenable number.

71391219317 is a deficient number, since it is larger than the sum of its proper divisors (7174889143).

71391219317 is a wasteful number, since it uses less digits than its factorization.

71391219317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712564 (or 712553 counting only the distinct ones).

The product of its digits is 71442, while the sum is 44.

The spelling of 71391219317 in words is "seventy-one billion, three hundred ninety-one million, two hundred nineteen thousand, three hundred seventeen".