243745665611 has 6 divisors (see below), whose sum is σ = 283540876380. Its totient is φ = 208924856196.

The previous prime is 243745665599. The next prime is 243745665623. The reversal of 243745665611 is 116566547342.

243745665611 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (243745665599) and next prime (243745665623).

It is not a de Polignac number, because 243745665611 - 2²² = 243741471307 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243745665611.

It is not an unprimeable number, because it can be changed into a prime (243745665011) 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 in 5 ways as a sum of consecutive naturals, for example, 2487200621 + ... + 2487200718.

It is an arithmetic number, because the mean of its divisors is an integer number (47256812730).

Almost surely, 2^243745665611 is an apocalyptic number.

243745665611 is a deficient number, since it is larger than the sum of its proper divisors (39795210769).

243745665611 is an equidigital number, since it uses as much as digits as its factorization.

243745665611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4974401353 (or 4974401346 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 50.

The spelling of 243745665611 in words is "two hundred forty-three billion, seven hundred forty-five million, six hundred sixty-five thousand, six hundred eleven".