243241737749 has 8 divisors (see below), whose sum is σ = 243686072280. Its totient is φ = 242797536000.

The previous prime is 243241737689. The next prime is 243241737763. The reversal of 243241737749 is 947737142342.

It can be written as a sum of positive squares in 4 ways, for example, as 3641277649 + 239600460100 = 60343^2 + 489490^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 243241737749 - 2²⁰ = 243240689173 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 243241737749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243241727749) 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, 4098809 + ... + 4157729.

It is an arithmetic number, because the mean of its divisors is an integer number (30460759035).

Almost surely, 2^243241737749 is an apocalyptic number.

It is an amenable number.

243241737749 is a deficient number, since it is larger than the sum of its proper divisors (444334531).

243241737749 is an equidigital number, since it uses as much as digits as its factorization.

243241737749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66391.

The product of its digits is 7112448, while the sum is 53.

The spelling of 243241737749 in words is "two hundred forty-three billion, two hundred forty-one million, seven hundred thirty-seven thousand, seven hundred forty-nine".