717122137472 has 128 divisors (see below), whose sum is σ = 1593028533600. Its totient is φ = 319277629440.

The previous prime is 717122137421. The next prime is 717122137477. The reversal of 717122137472 is 274731221717.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (717122137477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58721447 + ... + 58733657.

Almost surely, 2^717122137472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 717122137472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (796514266800).

717122137472 is an abundant number, since it is smaller than the sum of its proper divisors (875906396128).

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

717122137472 is a wasteful number, since it uses less digits than its factorization.

717122137472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13484 (or 13472 counting only the distinct ones).

The product of its digits is 230496, while the sum is 44.

The spelling of 717122137472 in words is "seven hundred seventeen billion, one hundred twenty-two million, one hundred thirty-seven thousand, four hundred seventy-two".