199556027243 has 2 divisors, whose sum is σ = 199556027244. Its totient is φ = 199556027242.

The previous prime is 199556027213. The next prime is 199556027317. The reversal of 199556027243 is 342720655991.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199556027243 is a prime.

It is not a weakly prime, because it can be changed into another prime (199556027213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99778013621 + 99778013622.

It is an arithmetic number, because the mean of its divisors is an integer number (99778013622).

Almost surely, 2^199556027243 is an apocalyptic number.

199556027243 is a deficient number, since it is larger than the sum of its proper divisors (1).

199556027243 is an equidigital number, since it uses as much as digits as its factorization.

199556027243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4082400, while the sum is 53.

The spelling of 199556027243 in words is "one hundred ninety-nine billion, five hundred fifty-six million, twenty-seven thousand, two hundred forty-three".