9669589228728 has 432 divisors, whose sum is σ = 31416329468160. Its totient is φ = 2683430830080.

The previous prime is 9669589228699. The next prime is 9669589228757. The reversal of 9669589228728 is 8278229859669.

9669589228728 is a `hidden beast` number, since 9 + 6 + 6 + 9 + 589 + 2 + 2 + 8 + 7 + 28 = 666.

It is an interprime number because it is at equal distance from previous prime (9669589228699) and next prime (9669589228757).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 186959800 + ... + 187011512.

It is an arithmetic number, because the mean of its divisors is an integer number (72722984880).

Almost surely, 2^{9669589228728} 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 9669589228728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15708164734080).

9669589228728 is an abundant number, since it is smaller than the sum of its proper divisors (21746740239432).

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

9669589228728 is a wasteful number, since it uses less digits than its factorization.

9669589228728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51900 (or 51869 counting only the distinct ones).

The product of its digits is 3762339840, while the sum is 81.

The spelling of 9669589228728 in words is "nine trillion, six hundred sixty-nine billion, five hundred eighty-nine million, two hundred twenty-eight thousand, seven hundred twenty-eight".