71664884013 has 24 divisors (see below), whose sum is σ = 99029912800. Its totient is φ = 46097343936.

The previous prime is 71664884003. The next prime is 71664884017. The reversal of 71664884013 is 31048846617.

It is not a de Polignac number, because 71664884013 - 2⁶ = 71664883949 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 (71664884017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3974823 + ... + 3992811.

Almost surely, 2^71664884013 is an apocalyptic number.

It is an amenable number.

71664884013 is a deficient number, since it is larger than the sum of its proper divisors (27365028787).

71664884013 is a wasteful number, since it uses less digits than its factorization.

71664884013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19629 (or 19600 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 71664884013 in words is "seventy-one billion, six hundred sixty-four million, eight hundred eighty-four thousand, thirteen".