243136326361 has 2 divisors, whose sum is σ = 243136326362. Its totient is φ = 243136326360.

The previous prime is 243136326319. The next prime is 243136326403. The reversal of 243136326361 is 163623631342.

It is a balanced prime because it is at equal distance from previous prime (243136326319) and next prime (243136326403).

It can be written as a sum of positive squares in only one way, i.e., 210860048025 + 32276278336 = 459195^2 + 179656^2 .

It is a cyclic number.

It is not a de Polignac number, because 243136326361 - 2¹¹ = 243136324313 is a prime.

It is not a weakly prime, because it can be changed into another prime (243136326761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121568163180 + 121568163181.

It is an arithmetic number, because the mean of its divisors is an integer number (121568163181).

Almost surely, 2^243136326361 is an apocalyptic number.

It is an amenable number.

243136326361 is a deficient number, since it is larger than the sum of its proper divisors (1).

243136326361 is an equidigital number, since it uses as much as digits as its factorization.

243136326361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 40.

The spelling of 243136326361 in words is "two hundred forty-three billion, one hundred thirty-six million, three hundred twenty-six thousand, three hundred sixty-one".