243336656361 has 16 divisors (see below), whose sum is σ = 324947367360. Its totient is φ = 161975296320.

The previous prime is 243336656333. The next prime is 243336656369. The reversal of 243336656361 is 163656633342.

It is a happy number.

It is not a de Polignac number, because 243336656361 - 2¹¹ = 243336654313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243336656361.

It is not an unprimeable number, because it can be changed into a prime (243336656369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11999971 + ... + 12020231.

It is an arithmetic number, because the mean of its divisors is an integer number (20309210460).

Almost surely, 2^243336656361 is an apocalyptic number.

It is an amenable number.

243336656361 is a deficient number, since it is larger than the sum of its proper divisors (81610710999).

243336656361 is a wasteful number, since it uses less digits than its factorization.

243336656361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26216.

The product of its digits is 4199040, while the sum is 48.

The spelling of 243336656361 in words is "two hundred forty-three billion, three hundred thirty-six million, six hundred fifty-six thousand, three hundred sixty-one".