71534243517 has 16 divisors (see below), whose sum is σ = 104382251328. Its totient is φ = 43215569280.

The previous prime is 71534243489. The next prime is 71534243549.

71534243517 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 71534243517 - 2⁶ = 71534243453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71534243597) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3452458 + ... + 3473115.

It is an arithmetic number, because the mean of its divisors is an integer number (6523890708).

Almost surely, 2^71534243517 is an apocalyptic number.

It is an amenable number.

71534243517 is a deficient number, since it is larger than the sum of its proper divisors (32848007811).

71534243517 is a wasteful number, since it uses less digits than its factorization.

71534243517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6925900.

The product of its digits is 352800, while the sum is 42.

The spelling of 71534243517 in words is "seventy-one billion, five hundred thirty-four million, two hundred forty-three thousand, five hundred seventeen".