243136326365 has 16 divisors (see below), whose sum is σ = 308970307440. Its totient is φ = 183041187840.

The previous prime is 243136326361. The next prime is 243136326403. The reversal of 243136326365 is 563623631342.

It can be written as a sum of positive squares in 8 ways, for example, as 65803536484 + 177332789881 = 256522^2 + 421109^2 .

It is not a de Polignac number, because 243136326365 - 2² = 243136326361 is a prime.

It is a super-2 number, since 2×243136326365² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243136326361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 404441 + ... + 806129.

It is an arithmetic number, because the mean of its divisors is an integer number (19310644215).

Almost surely, 2^243136326365 is an apocalyptic number.

It is an amenable number.

243136326365 is a deficient number, since it is larger than the sum of its proper divisors (65833981075).

243136326365 is a wasteful number, since it uses less digits than its factorization.

243136326365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408832.

The product of its digits is 1399680, while the sum is 44.

The spelling of 243136326365 in words is "two hundred forty-three billion, one hundred thirty-six million, three hundred twenty-six thousand, three hundred sixty-five".