199944519699 has 16 divisors (see below), whose sum is σ = 272279351808. Its totient is φ = 130453318752.

The previous prime is 199944519689. The next prime is 199944519703. The reversal of 199944519699 is 996915449991.

It is not a de Polignac number, because 199944519699 - 2⁸ = 199944519443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199944519699.

It is not an unprimeable number, because it can be changed into a prime (199944519689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5065789 + ... + 5105105.

It is an arithmetic number, because the mean of its divisors is an integer number (17017459488).

Almost surely, 2^199944519699 is an apocalyptic number.

199944519699 is a deficient number, since it is larger than the sum of its proper divisors (72334832109).

199944519699 is a wasteful number, since it uses less digits than its factorization.

199944519699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75434.

The product of its digits is 255091680, while the sum is 75.

The spelling of 199944519699 in words is "one hundred ninety-nine billion, nine hundred forty-four million, five hundred nineteen thousand, six hundred ninety-nine".