9821976856 has 96 divisors (see below), whose sum is σ = 19788552000. Its totient is φ = 4568427072.

The previous prime is 9821976839. The next prime is 9821976877. The reversal of 9821976856 is 6586791289.

9821976856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 9821976794 and 9821976803.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 34706491 + ... + 34706773.

It is an arithmetic number, because the mean of its divisors is an integer number (206130750).

Almost surely, 2^9821976856 is an apocalyptic number.

It is an amenable number.

9821976856 is an abundant number, since it is smaller than the sum of its proper divisors (9966575144).

9821976856 is a wasteful number, since it uses less digits than its factorization.

9821976856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533 (or 506 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 61.

The square root of 9821976856 is about 99105.8870905256. The cubic root of 9821976856 is about 2141.5734240506.

The spelling of 9821976856 in words is "nine billion, eight hundred twenty-one million, nine hundred seventy-six thousand, eight hundred fifty-six".