9726568128 has 70 divisors (see below), whose sum is σ = 28832610356. Its totient is φ = 3242187648.

The previous prime is 9726568127. The next prime is 9726568151. The reversal of 9726568128 is 8218656279.

9726568128 is a `hidden beast` number, since 9 + 72 + 6 + 568 + 1 + 2 + 8 = 666.

9726568128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×9726568128² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (9726568127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 932950 + ... + 943317.

Almost surely, 2^9726568128 is an apocalyptic number.

It is an amenable number.

9726568128 is an abundant number, since it is smaller than the sum of its proper divisors (19106042228).

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

9726568128 is a wasteful number, since it uses less digits than its factorization.

9726568128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876291 (or 1876272 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 9726568128 is about 98623.3650206684. The cubic root of 9726568128 is about 2134.6165767329.

The spelling of 9726568128 in words is "nine billion, seven hundred twenty-six million, five hundred sixty-eight thousand, one hundred twenty-eight".