243601858834441 has 2 divisors, whose sum is σ = 243601858834442. Its totient is φ = 243601858834440.

The previous prime is 243601858834429. The next prime is 243601858834459. The reversal of 243601858834441 is 144438858106342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228583102671225 + 15018756163216 = 15118965^2 + 3875404^2 .

It is a cyclic number.

It is not a de Polignac number, because 243601858834441 - 2⁵ = 243601858834409 is a prime.

It is a super-3 number, since 3×243601858834441³ (a number of 44 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243601858834441.

It is not a weakly prime, because it can be changed into another prime (243601858834471) 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 as a sum of consecutive naturals, namely, 121800929417220 + 121800929417221.

It is an arithmetic number, because the mean of its divisors is an integer number (121800929417221).

Almost surely, 2^{243601858834441} is an apocalyptic number.

It is an amenable number.

243601858834441 is a deficient number, since it is larger than the sum of its proper divisors (1).

243601858834441 is an equidigital number, since it uses as much as digits as its factorization.

243601858834441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70778880, while the sum is 61.

The spelling of 243601858834441 in words is "two hundred forty-three trillion, six hundred one billion, eight hundred fifty-eight million, eight hundred thirty-four thousand, four hundred forty-one".