199786155241 has 2 divisors, whose sum is σ = 199786155242. Its totient is φ = 199786155240.

The previous prime is 199786155227. The next prime is 199786155259. The reversal of 199786155241 is 142551687991.

199786155241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153197091216 + 46589064025 = 391404^2 + 215845^2 .

It is an emirp because it is prime and its reverse (142551687991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199786155241 - 2⁷ = 199786155113 is a prime.

It is not a weakly prime, because it can be changed into another prime (199786155221) by changing a digit.

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, 99893077620 + 99893077621.

It is an arithmetic number, because the mean of its divisors is an integer number (99893077621).

Almost surely, 2^199786155241 is an apocalyptic number.

It is an amenable number.

199786155241 is a deficient number, since it is larger than the sum of its proper divisors (1).

199786155241 is an equidigital number, since it uses as much as digits as its factorization.

199786155241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5443200, while the sum is 58.

The spelling of 199786155241 in words is "one hundred ninety-nine billion, seven hundred eighty-six million, one hundred fifty-five thousand, two hundred forty-one".