9725761128 has 32 divisors (see below), whose sum is σ = 24353847360. Its totient is φ = 3236661120.

The previous prime is 9725761061. The next prime is 9725761153. The reversal of 9725761128 is 8211675279.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313588 + ... + 343203.

It is an arithmetic number, because the mean of its divisors is an integer number (761057730).

Almost surely, 2^9725761128 is an apocalyptic number.

It is an amenable number.

9725761128 is an abundant number, since it is smaller than the sum of its proper divisors (14628086232).

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

9725761128 is a wasteful number, since it uses less digits than its factorization.

9725761128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657417 (or 657413 counting only the distinct ones).

The product of its digits is 423360, while the sum is 48.

The square root of 9725761128 is about 98619.2736132243. The cubic root of 9725761128 is about 2134.5575396982.

The spelling of 9725761128 in words is "nine billion, seven hundred twenty-five million, seven hundred sixty-one thousand, one hundred twenty-eight".