243655526129 has 2 divisors, whose sum is σ = 243655526130. Its totient is φ = 243655526128.

The previous prime is 243655526117. The next prime is 243655526131. The reversal of 243655526129 is 921625556342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 236935297600 + 6720228529 = 486760^2 + 81977^2 .

It is a cyclic number.

It is not a de Polignac number, because 243655526129 - 2²⁸ = 243387090673 is a prime.

It is a super-3 number, since 3×243655526129³ (a number of 35 digits) contains 333 as substring.

Together with 243655526131, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243655522129) 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, 121827763064 + 121827763065.

It is an arithmetic number, because the mean of its divisors is an integer number (121827763065).

Almost surely, 2^243655526129 is an apocalyptic number.

It is an amenable number.

243655526129 is a deficient number, since it is larger than the sum of its proper divisors (1).

243655526129 is an equidigital number, since it uses as much as digits as its factorization.

243655526129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888000, while the sum is 50.

The spelling of 243655526129 in words is "two hundred forty-three billion, six hundred fifty-five million, five hundred twenty-six thousand, one hundred twenty-nine".