999998811200 has 84 divisors (see below), whose sum is σ = 2491769504640. Its totient is φ = 394936189440.

The previous prime is 999998811199. The next prime is 999998811221. The reversal of 999998811200 is 2118899999.

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, 3829292 + ... + 4082091.

Almost surely, 2^999998811200 is an apocalyptic number.

It is an amenable number.

999998811200 is an abundant number, since it is smaller than the sum of its proper divisors (1491770693440).

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

999998811200 is a wasteful number, since it uses less digits than its factorization.

999998811200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7911484 (or 7911469 counting only the distinct ones).

The product of its (nonzero) digits is 7558272, while the sum is 65.

The spelling of 999998811200 in words is "nine hundred ninety-nine billion, nine hundred ninety-eight million, eight hundred eleven thousand, two hundred".