71813968959 has 4 divisors (see below), whose sum is σ = 95751958616. Its totient is φ = 47875979304.

The previous prime is 71813968939. The next prime is 71813968969. The reversal of 71813968959 is 95986931817.

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

It is not a de Polignac number, because 71813968959 - 2⁸ = 71813968703 is a prime.

It is a super-2 number, since 2×71813968959² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71813968959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71813968909) 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, 11968994824 + ... + 11968994829.

It is an arithmetic number, because the mean of its divisors is an integer number (23937989654).

Almost surely, 2^71813968959 is an apocalyptic number.

71813968959 is a deficient number, since it is larger than the sum of its proper divisors (23937989657).

71813968959 is a wasteful number, since it uses less digits than its factorization.

71813968959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23937989656.

The product of its digits is 29393280, while the sum is 66.

The spelling of 71813968959 in words is "seventy-one billion, eight hundred thirteen million, nine hundred sixty-eight thousand, nine hundred fifty-nine".