9538665471729 has 27 divisors (see below), whose sum is σ = 14016360352683. Its totient is φ = 6250970520864.

The previous prime is 9538665471703. The next prime is 9538665471749. The reversal of 9538665471729 is 9271745668359.

The square root of 9538665471729 is 3088473.

It is a perfect power (a square), and thus also a powerful number.

9538665471729 is a `hidden beast` number, since 9 + 5 + 3 + 8 + 6 + 6 + 547 + 1 + 72 + 9 = 666.

9538665471729 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., 9484077822129 + 54587649600 = 3079623^2 + 233640^2 .

It is not a de Polignac number, because 9538665471729 - 2⁹ = 9538665471217 is a prime.

It is a super-2 number, since 2×9538665471729² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9538665471749) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 546650997 + ... + 546668445.

Almost surely, 2^{9538665471729} is an apocalyptic number.

9538665471729 is the 3088473-rd square number.

9538665471729 is the 1544237-th centered octagonal number.

It is an amenable number.

9538665471729 is a deficient number, since it is larger than the sum of its proper divisors (4477694880954).

9538665471729 is an frugal number, since it uses more digits than its factorization.

9538665471729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35022 (or 17511 counting only the distinct ones).

The product of its digits is 685843200, while the sum is 72.

The spelling of 9538665471729 in words is "nine trillion, five hundred thirty-eight billion, six hundred sixty-five million, four hundred seventy-one thousand, seven hundred twenty-nine".