243290578527361 has 2 divisors, whose sum is σ = 243290578527362. Its totient is φ = 243290578527360.

The previous prime is 243290578527341. The next prime is 243290578527401. The reversal of 243290578527361 is 163725875092342.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231357484993600 + 11933093533761 = 15210440^2 + 3454431^2 .

It is a cyclic number.

It is not a de Polignac number, because 243290578527361 - 2²³ = 243290570138753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243290578527293 and 243290578527302.

It is not a weakly prime, because it can be changed into another prime (243290578527341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121645289263680 + 121645289263681.

It is an arithmetic number, because the mean of its divisors is an integer number (121645289263681).

It is a 1-persistent number, because it is pandigital, but 2⋅243290578527361 = 486581157054722 is not.

Almost surely, 2^{243290578527361} is an apocalyptic number.

It is an amenable number.

243290578527361 is a deficient number, since it is larger than the sum of its proper divisors (1).

243290578527361 is an equidigital number, since it uses as much as digits as its factorization.

243290578527361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 152409600, while the sum is 64.

The spelling of 243290578527361 in words is "two hundred forty-three trillion, two hundred ninety billion, five hundred seventy-eight million, five hundred twenty-seven thousand, three hundred sixty-one".