716864221728 has 54 divisors (see below), whose sum is σ = 2038623492087. Its totient is φ = 238949951040.

The previous prime is 716864221721. The next prime is 716864221729. The reversal of 716864221728 is 827122468617.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

716864221728 is a `hidden beast` number, since 71 + 6 + 86 + 422 + 1 + 72 + 8 = 666.

716864221728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 358432110864 + 358432110864 = 598692^2 + 598692^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=598692.

It is a super-2 number, since 2×716864221728² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (716864221721) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 14343663 + ... + 14393553.

Almost surely, 2^716864221728 is an apocalyptic number.

It is an amenable number.

716864221728 is an abundant number, since it is smaller than the sum of its proper divisors (1321759270359).

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

716864221728 is an frugal number, since it uses more digits than its factorization.

716864221728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99798 (or 49896 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 54.

The spelling of 716864221728 in words is "seven hundred sixteen billion, eight hundred sixty-four million, two hundred twenty-one thousand, seven hundred twenty-eight".