243337074073261 has 12 divisors (see below), whose sum is σ = 283069000132380. Its totient is φ = 208572111847680.

The previous prime is 243337074073259. The next prime is 243337074073279. The reversal of 243337074073261 is 162370470733342.

It can be written as a sum of positive squares in 2 ways, for example, as 90544854436036 + 152792219637225 = 9515506^2 + 12360915^2 .

It is not a de Polignac number, because 243337074073261 - 2¹ = 243337074073259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243337074073199 and 243337074073208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243337074073201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25938916 + ... + 34051453.

It is an arithmetic number, because the mean of its divisors is an integer number (23589083344365).

Almost surely, 2^{243337074073261} is an apocalyptic number.

It is an amenable number.

243337074073261 is a deficient number, since it is larger than the sum of its proper divisors (39731926059119).

243337074073261 is an equidigital number, since it uses as much as digits as its factorization.

243337074073261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60073164 (or 60073157 counting only the distinct ones).

The product of its (nonzero) digits is 10668672, while the sum is 52.

The spelling of 243337074073261 in words is "two hundred forty-three trillion, three hundred thirty-seven billion, seventy-four million, seventy-three thousand, two hundred sixty-one".