199618268 has 6 divisors (see below), whose sum is σ = 349331976. Its totient is φ = 99809132.

The previous prime is 199618247. The next prime is 199618277. The reversal of 199618268 is 862816991.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 24952280 + ... + 24952287.

It is an arithmetic number, because the mean of its divisors is an integer number (58221996).

Almost surely, 2^199618268 is an apocalyptic number.

It is an amenable number.

199618268 is a deficient number, since it is larger than the sum of its proper divisors (149713708).

199618268 is a wasteful number, since it uses less digits than its factorization.

199618268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49904571 (or 49904569 counting only the distinct ones).

The product of its digits is 373248, while the sum is 50.

The square root of 199618268 is about 14128.6329133430. The cubic root of 199618268 is about 584.4312469638.

The spelling of 199618268 in words is "one hundred ninety-nine million, six hundred eighteen thousand, two hundred sixty-eight".