9771820996 has 24 divisors (see below), whose sum is σ = 19716600960. Its totient is φ = 4150860672.

The previous prime is 9771820987. The next prime is 9771820997. The reversal of 9771820996 is 6990281779.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 9771820996.

It is not an unprimeable number, because it can be changed into a prime (9771820997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1541056 + ... + 1547383.

It is an arithmetic number, because the mean of its divisors is an integer number (821525040).

Almost surely, 2^9771820996 is an apocalyptic number.

It is an amenable number.

9771820996 is an abundant number, since it is smaller than the sum of its proper divisors (9944779964).

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

9771820996 is a wasteful number, since it uses less digits than its factorization.

9771820996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3088563 (or 3088561 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 58.

The square root of 9771820996 is about 98852.5214448271. The cubic root of 9771820996 is about 2137.9218912841.

The spelling of 9771820996 in words is "nine billion, seven hundred seventy-one million, eight hundred twenty thousand, nine hundred ninety-six".