9721845835 has 32 divisors (see below), whose sum is σ = 12723822720. Its totient is φ = 7130448000.

The previous prime is 9721845823. The next prime is 9721845841. The reversal of 9721845835 is 5385481279.

It is a happy number.

9721845835 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9721845835 - 2⁵ = 9721845803 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1655805 + ... + 1661665.

It is an arithmetic number, because the mean of its divisors is an integer number (397619460).

Almost surely, 2^9721845835 is an apocalyptic number.

9721845835 is a deficient number, since it is larger than the sum of its proper divisors (3001976885).

9721845835 is a wasteful number, since it uses less digits than its factorization.

9721845835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6056 (or 6030 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 52.

The square root of 9721845835 is about 98599.4210682801. The cubic root of 9721845835 is about 2134.2710654636.

The spelling of 9721845835 in words is "nine billion, seven hundred twenty-one million, eight hundred forty-five thousand, eight hundred thirty-five".