199242863641 has 2 divisors, whose sum is σ = 199242863642. Its totient is φ = 199242863640.

The previous prime is 199242863597. The next prime is 199242863689. The reversal of 199242863641 is 146368242991.

199242863641 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., 140778041616 + 58464822025 = 375204^2 + 241795^2 .

It is a cyclic number.

It is not a de Polignac number, because 199242863641 - 2⁹ = 199242863129 is a prime.

It is a super-2 number, since 2×199242863641² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (199242864641) 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, 99621431820 + 99621431821.

It is an arithmetic number, because the mean of its divisors is an integer number (99621431821).

Almost surely, 2^199242863641 is an apocalyptic number.

It is an amenable number.

199242863641 is a deficient number, since it is larger than the sum of its proper divisors (1).

199242863641 is an equidigital number, since it uses as much as digits as its factorization.

199242863641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4478976, while the sum is 55.

The spelling of 199242863641 in words is "one hundred ninety-nine billion, two hundred forty-two million, eight hundred sixty-three thousand, six hundred forty-one".