199681612 has 18 divisors (see below), whose sum is σ = 378392028. Its totient is φ = 92160432.

The previous prime is 199681589. The next prime is 199681619. The reversal of 199681612 is 216186991.

It is not an unprimeable number, because it can be changed into a prime (199681619) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 147018 + ... + 148369.

Almost surely, 2^199681612 is an apocalyptic number.

It is an amenable number.

199681612 is a deficient number, since it is larger than the sum of its proper divisors (178710416).

199681612 is a wasteful number, since it uses less digits than its factorization.

199681612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295417 (or 295402 counting only the distinct ones).

The product of its digits is 46656, while the sum is 43.

The square root of 199681612 is about 14130.8744244650. The cubic root of 199681612 is about 584.4930587711.

The spelling of 199681612 in words is "one hundred ninety-nine million, six hundred eighty-one thousand, six hundred twelve".