199243656 has 48 divisors (see below), whose sum is σ = 540711600. Its totient is φ = 66280032.

The previous prime is 199243643. The next prime is 199243663. The reversal of 199243656 is 656342991.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36855 + ... + 41913.

It is an arithmetic number, because the mean of its divisors is an integer number (11264825).

Almost surely, 2^199243656 is an apocalyptic number.

It is an amenable number.

199243656 is an abundant number, since it is smaller than the sum of its proper divisors (341467944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199243656 is a wasteful number, since it uses less digits than its factorization.

199243656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5618 (or 5611 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 199243656 is about 14115.3694956951. The cubic root of 199243656 is about 584.0654286486.

The spelling of 199243656 in words is "one hundred ninety-nine million, two hundred forty-three thousand, six hundred fifty-six".