99595021800 has 96 divisors (see below), whose sum is σ = 308842732800. Its totient is φ = 26550228480.

The previous prime is 99595021789. The next prime is 99595021819. The reversal of 99595021800 is 812059599.

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 99595021800.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1990692 + ... + 2040108.

It is an arithmetic number, because the mean of its divisors is an integer number (3217111800).

Almost surely, 2^99595021800 is an apocalyptic number.

It is an amenable number.

99595021800 is an abundant number, since it is smaller than the sum of its proper divisors (209247711000).

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

99595021800 is a wasteful number, since it uses less digits than its factorization.

99595021800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52795 (or 52786 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 48.

The spelling of 99595021800 in words is "ninety-nine billion, five hundred ninety-five million, twenty-one thousand, eight hundred".