243660120041 has 4 divisors (see below), whose sum is σ = 262403206212. Its totient is φ = 224917033872.

The previous prime is 243660120007. The next prime is 243660120061. The reversal of 243660120041 is 140021066342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 140021066342 = 2 ⋅70010533171.

It can be written as a sum of positive squares in 2 ways, for example, as 135132700816 + 108527419225 = 367604^2 + 329435^2 .

It is a cyclic number.

It is not a de Polignac number, because 243660120041 - 2¹⁴ = 243660103657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243660119986 and 243660120013.

It is not an unprimeable number, because it can be changed into a prime (243660120061) 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, 9371543066 + ... + 9371543091.

It is an arithmetic number, because the mean of its divisors is an integer number (65600801553).

Almost surely, 2^243660120041 is an apocalyptic number.

It is an amenable number.

243660120041 is a deficient number, since it is larger than the sum of its proper divisors (18743086171).

243660120041 is a wasteful number, since it uses less digits than its factorization.

243660120041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18743086170.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 243660120041 its reverse (140021066342), we get a palindrome (383681186383).

The spelling of 243660120041 in words is "two hundred forty-three billion, six hundred sixty million, one hundred twenty thousand, forty-one".