71721236322 has 90 divisors (see below), whose sum is σ = 164211776883. Its totient is φ = 23396918688.

The previous prime is 71721236273. The next prime is 71721236359. The reversal of 71721236322 is 22363212717.

71721236322 is a `hidden beast` number, since 7 + 1 + 7 + 2 + 12 + 3 + 632 + 2 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 61707031281 + 10014205041 = 248409^2 + 100071^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=189369.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 180657828 + ... + 180658224.

Almost surely, 2^71721236322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71721236322

71721236322 is an abundant number, since it is smaller than the sum of its proper divisors (92490540561).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71721236322 is an frugal number, since it uses more digits than its factorization.

71721236322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914 (or 455 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The spelling of 71721236322 in words is "seventy-one billion, seven hundred twenty-one million, two hundred thirty-six thousand, three hundred twenty-two".