242774566481 has 2 divisors, whose sum is σ = 242774566482. Its totient is φ = 242774566480.

The previous prime is 242774566373. The next prime is 242774566519. The reversal of 242774566481 is 184665477242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212373505600 + 30401060881 = 460840^2 + 174359^2 .

It is a cyclic number.

It is not a de Polignac number, because 242774566481 - 2¹⁸ = 242774304337 is a prime.

It is a super-2 number, since 2×242774566481² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (242774569481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121387283240 + 121387283241.

It is an arithmetic number, because the mean of its divisors is an integer number (121387283241).

Almost surely, 2^242774566481 is an apocalyptic number.

It is an amenable number.

242774566481 is a deficient number, since it is larger than the sum of its proper divisors (1).

242774566481 is an equidigital number, since it uses as much as digits as its factorization.

242774566481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18063360, while the sum is 56.

The spelling of 242774566481 in words is "two hundred forty-two billion, seven hundred seventy-four million, five hundred sixty-six thousand, four hundred eighty-one".