71816338789 has 8 divisors (see below), whose sum is σ = 81890124120. Its totient is φ = 62392475136.

The previous prime is 71816338777. The next prime is 71816338793. The reversal of 71816338789 is 98783361817.

It can be written as a sum of positive squares in 4 ways, for example, as 2536834689 + 69279504100 = 50367^2 + 263210^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71816338789 - 2⁹ = 71816338277 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 (71816338289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162480184 + ... + 162480625.

It is an arithmetic number, because the mean of its divisors is an integer number (10236265515).

Almost surely, 2^71816338789 is an apocalyptic number.

It is an amenable number.

71816338789 is a deficient number, since it is larger than the sum of its proper divisors (10073785331).

71816338789 is a wasteful number, since it uses less digits than its factorization.

71816338789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324960839.

The product of its digits is 12192768, while the sum is 61.

The spelling of 71816338789 in words is "seventy-one billion, eight hundred sixteen million, three hundred thirty-eight thousand, seven hundred eighty-nine".