71722817044 has 12 divisors (see below), whose sum is σ = 126431098164. Its totient is φ = 35599646144.

The previous prime is 71722817003. The next prime is 71722817051. The reversal of 71722817044 is 44071822717.

It can be written as a sum of positive squares in 2 ways, for example, as 42338000644 + 29384816400 = 205762^2 + 171420^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65439979 + ... + 65441074.

It is an arithmetic number, because the mean of its divisors is an integer number (10535924847).

Almost surely, 2^71722817044 is an apocalyptic number.

It is an amenable number.

71722817044 is a deficient number, since it is larger than the sum of its proper divisors (54708281120).

71722817044 is a wasteful number, since it uses less digits than its factorization.

71722817044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130881194 (or 130881192 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 43.

The spelling of 71722817044 in words is "seventy-one billion, seven hundred twenty-two million, eight hundred seventeen thousand, forty-four".