205112245660043 has 4 divisors (see below), whose sum is σ = 205112323204008. Its totient is φ = 205112168116080.

The previous prime is 205112245660039. The next prime is 205112245660061. The reversal of 205112245660043 is 340066542211502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 205112245660043 - 2² = 205112245660039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205112245665043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34658873 + ... + 40143018.

It is an arithmetic number, because the mean of its divisors is an integer number (51278080801002).

Almost surely, 2^{205112245660043} is an apocalyptic number.

205112245660043 is a deficient number, since it is larger than the sum of its proper divisors (77543965).

205112245660043 is an equidigital number, since it uses as much as digits as its factorization.

205112245660043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77543964.

The product of its (nonzero) digits is 345600, while the sum is 41.

Adding to 205112245660043 its reverse (340066542211502), we get a palindrome (545178787871545).

The spelling of 205112245660043 in words is "two hundred five trillion, one hundred twelve billion, two hundred forty-five million, six hundred sixty thousand, forty-three".