199558655999 has 2 divisors, whose sum is σ = 199558656000. Its totient is φ = 199558655998.

The previous prime is 199558655981. The next prime is 199558656047. The reversal of 199558655999 is 999556855991.

It is a weak prime.

It is an emirp because it is prime and its reverse (999556855991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199558655999 - 2¹⁶ = 199558590463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199558655909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99779327999 + 99779328000.

It is an arithmetic number, because the mean of its divisors is an integer number (99779328000).

Almost surely, 2^199558655999 is an apocalyptic number.

199558655999 is a deficient number, since it is larger than the sum of its proper divisors (1).

199558655999 is an equidigital number, since it uses as much as digits as its factorization.

199558655999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1771470000, while the sum is 80.

The spelling of 199558655999 in words is "one hundred ninety-nine billion, five hundred fifty-eight million, six hundred fifty-five thousand, nine hundred ninety-nine".