199640368242233 has 2 divisors, whose sum is σ = 199640368242234. Its totient is φ = 199640368242232.

The previous prime is 199640368242187. The next prime is 199640368242277. The reversal of 199640368242233 is 332242863046991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131051941675264 + 68588426566969 = 11447792^2 + 8281813^2 .

It is a cyclic number.

It is not a de Polignac number, because 199640368242233 - 2¹⁸ = 199640367980089 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (199640368142233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99820184121116 + 99820184121117.

It is an arithmetic number, because the mean of its divisors is an integer number (99820184121117).

Almost surely, 2^{199640368242233} is an apocalyptic number.

It is an amenable number.

199640368242233 is a deficient number, since it is larger than the sum of its proper divisors (1).

199640368242233 is an equidigital number, since it uses as much as digits as its factorization.

199640368242233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80621568, while the sum is 62.

The spelling of 199640368242233 in words is "one hundred ninety-nine trillion, six hundred forty billion, three hundred sixty-eight million, two hundred forty-two thousand, two hundred thirty-three".