199427618043 has 6 divisors (see below), whose sum is σ = 288062114964. Its totient is φ = 132951745356.

The previous prime is 199427618041. The next prime is 199427618057. The reversal of 199427618043 is 340816724991.

199427618043 is a `hidden beast` number, since 19 + 9 + 4 + 2 + 7 + 618 + 0 + 4 + 3 = 666.

It is not a de Polignac number, because 199427618043 - 2¹ = 199427618041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199427618041) 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, 11079312105 + ... + 11079312122.

It is an arithmetic number, because the mean of its divisors is an integer number (48010352494).

Almost surely, 2^199427618043 is an apocalyptic number.

199427618043 is a deficient number, since it is larger than the sum of its proper divisors (88634496921).

199427618043 is a wasteful number, since it uses less digits than its factorization.

199427618043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22158624233 (or 22158624230 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 199427618043 in words is "one hundred ninety-nine billion, four hundred twenty-seven million, six hundred eighteen thousand, forty-three".