243337551617641 has 4 divisors (see below), whose sum is σ = 262055824819012. Its totient is φ = 224619278416272.

The previous prime is 243337551617617. The next prime is 243337551617659. The reversal of 243337551617641 is 146716155733342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 162634009862416 + 80703541755225 = 12752804^2 + 8983515^2 .

It is a cyclic number.

It is not a de Polignac number, because 243337551617641 - 2¹⁹ = 243337551093353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243337551677641) 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, 9359136600666 + ... + 9359136600691.

It is an arithmetic number, because the mean of its divisors is an integer number (65513956204753).

Almost surely, 2^{243337551617641} is an apocalyptic number.

It is an amenable number.

243337551617641 is a deficient number, since it is larger than the sum of its proper divisors (18718273201371).

243337551617641 is a wasteful number, since it uses less digits than its factorization.

243337551617641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18718273201370.

The product of its digits is 38102400, while the sum is 58.

The spelling of 243337551617641 in words is "two hundred forty-three trillion, three hundred thirty-seven billion, five hundred fifty-one million, six hundred seventeen thousand, six hundred forty-one".