199987005568 has 256 divisors, whose sum is σ = 523879833600. Its totient is φ = 73952870400.

The previous prime is 199987005521. The next prime is 199987005571. The reversal of 199987005568 is 865500789991.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8960503 + ... + 8982793.

It is an arithmetic number, because the mean of its divisors is an integer number (2046405600).

Almost surely, 2^199987005568 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 199987005568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261939916800).

199987005568 is an abundant number, since it is smaller than the sum of its proper divisors (323892828032).

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

199987005568 is a wasteful number, since it uses less digits than its factorization.

199987005568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22379 (or 22367 counting only the distinct ones).

The product of its (nonzero) digits is 48988800, while the sum is 67.

The spelling of 199987005568 in words is "one hundred ninety-nine billion, nine hundred eighty-seven million, five thousand, five hundred sixty-eight".