9979999800 has 48 divisors (see below), whose sum is σ = 30938001240. Its totient is φ = 2661333120.

The previous prime is 9979999649. The next prime is 9979999823. The reversal of 9979999800 is 89999799.

9979999800 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11 ways as a sum of consecutive naturals, for example, 8316067 + ... + 8317266.

Almost surely, 2^9979999800 is an apocalyptic number.

It is an amenable number.

9979999800 is an abundant number, since it is smaller than the sum of its proper divisors (20958001440).

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

9979999800 is a wasteful number, since it uses less digits than its factorization.

9979999800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16633352 (or 16633343 counting only the distinct ones).

The product of its (nonzero) digits is 29760696, while the sum is 69.

The square root of 9979999800 is about 99899.9489489359. The cubic root of 9979999800 is about 2152.9974272646.

The spelling of 9979999800 in words is "nine billion, nine hundred seventy-nine million, nine hundred ninety-nine thousand, eight hundred".