199161644 has 18 divisors (see below), whose sum is σ = 383099052. Its totient is φ = 90527800.

The previous prime is 199161631. The next prime is 199161649. The reversal of 199161644 is 446161991.

It is not an unprimeable number, because it can be changed into a prime (199161649) 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 5 ways as a sum of consecutive naturals, for example, 205262 + ... + 206229.

Almost surely, 2^199161644 is an apocalyptic number.

It is an amenable number.

199161644 is a deficient number, since it is larger than the sum of its proper divisors (183937408).

199161644 is a wasteful number, since it uses less digits than its factorization.

199161644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411517 (or 411504 counting only the distinct ones).

The product of its digits is 46656, while the sum is 41.

The square root of 199161644 is about 14112.4641363583. The cubic root of 199161644 is about 583.9852806386.

The spelling of 199161644 in words is "one hundred ninety-nine million, one hundred sixty-one thousand, six hundred forty-four".