71881183841 has 4 divisors (see below), whose sum is σ = 72398314800. Its totient is φ = 71364052884.

The previous prime is 71881183817. The next prime is 71881183853. The reversal of 71881183841 is 14838118817.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71881183841 is a prime.

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 71881183841.

It is not an unprimeable number, because it can be changed into a prime (71881183441) 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, 258565271 + ... + 258565548.

It is an arithmetic number, because the mean of its divisors is an integer number (18099578700).

Almost surely, 2^71881183841 is an apocalyptic number.

It is an amenable number.

71881183841 is a deficient number, since it is larger than the sum of its proper divisors (517130959).

71881183841 is a wasteful number, since it uses less digits than its factorization.

71881183841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517130958.

The product of its digits is 344064, while the sum is 50.

The spelling of 71881183841 in words is "seventy-one billion, eight hundred eighty-one million, one hundred eighty-three thousand, eight hundred forty-one".