9855569900 has 144 divisors (see below), whose sum is σ = 24121456128. Its totient is φ = 3464160000.

The previous prime is 9855569887. The next prime is 9855569947. The reversal of 9855569900 is 99655589.

9855569900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 47 ways as a sum of consecutive naturals, for example, 4776269 + ... + 4778331.

It is an arithmetic number, because the mean of its divisors is an integer number (167510112).

Almost surely, 2^9855569900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9855569900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12060728064).

9855569900 is an abundant number, since it is smaller than the sum of its proper divisors (14265886228).

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

9855569900 is a wasteful number, since it uses less digits than its factorization.

9855569900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232 (or 2225 counting only the distinct ones).

The product of its (nonzero) digits is 4374000, while the sum is 56.

The square root of 9855569900 is about 99275.2229914393. Note that the first 3 decimals coincide. The cubic root of 9855569900 is about 2144.0121763969.

The spelling of 9855569900 in words is "nine billion, eight hundred fifty-five million, five hundred sixty-nine thousand, nine hundred".