199893044836 has 9 divisors (see below), whose sum is σ = 349814393299. Its totient is φ = 99946075324.

The previous prime is 199893044833. The next prime is 199893044839. The reversal of 199893044836 is 638440398991.

The square root of 199893044836 is 447094.

It is a perfect power (a square), and thus also a powerful number.

199893044836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (199893044833) and next prime (199893044839).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199893044833) by changing a digit.

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 2 ways as a sum of consecutive naturals, for example, 782415 + ... + 1005961.

Almost surely, 2^199893044836 is an apocalyptic number.

199893044836 is the 447094-th square number.

It is an amenable number.

199893044836 is a deficient number, since it is larger than the sum of its proper divisors (149921348463).

199893044836 is an frugal number, since it uses more digits than its factorization.

199893044836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447098 (or 223549 counting only the distinct ones).

The product of its (nonzero) digits is 40310784, while the sum is 64.

Multiplying 199893044836 by its sum of digits (64), we get a square (12793154869504 = 3576752²).

The spelling of 199893044836 in words is "one hundred ninety-nine billion, eight hundred ninety-three million, forty-four thousand, eight hundred thirty-six".