243541011543641 has 8 divisors (see below), whose sum is σ = 278333123733120. Its totient is φ = 208749034132128.

The previous prime is 243541011543617. The next prime is 243541011543679. The reversal of 243541011543641 is 146345110145342.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243541011543641 - 2¹⁸ = 243541011281497 is a prime.

It is a super-3 number, since 3×243541011543641³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243541011543592 and 243541011543601.

It is not an unprimeable number, because it can be changed into a prime (243541011543611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29792261 + ... + 37076418.

It is an arithmetic number, because the mean of its divisors is an integer number (34791640466640).

Almost surely, 2^{243541011543641} is an apocalyptic number.

It is an amenable number.

243541011543641 is a deficient number, since it is larger than the sum of its proper divisors (34792112189479).

243541011543641 is an equidigital number, since it uses as much as digits as its factorization.

243541011543641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67388983.

The product of its (nonzero) digits is 691200, while the sum is 44.

Adding to 243541011543641 its reverse (146345110145342), we get a palindrome (389886121688983).

The spelling of 243541011543641 in words is "two hundred forty-three trillion, five hundred forty-one billion, eleven million, five hundred forty-three thousand, six hundred forty-one".