240565725649 has 2 divisors, whose sum is σ = 240565725650. Its totient is φ = 240565725648.

The previous prime is 240565725623. The next prime is 240565725661. The reversal of 240565725649 is 946527565042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 240555916225 + 9809424 = 490465^2 + 3132^2 .

It is a cyclic number.

It is not a de Polignac number, because 240565725649 - 2²¹ = 240563628497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 240565725649.

It is not a weakly prime, because it can be changed into another prime (240565725749) 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, 120282862824 + 120282862825.

It is an arithmetic number, because the mean of its divisors is an integer number (120282862825).

Almost surely, 2^240565725649 is an apocalyptic number.

It is an amenable number.

240565725649 is a deficient number, since it is larger than the sum of its proper divisors (1).

240565725649 is an equidigital number, since it uses as much as digits as its factorization.

240565725649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144000, while the sum is 55.

The spelling of 240565725649 in words is "two hundred forty billion, five hundred sixty-five million, seven hundred twenty-five thousand, six hundred forty-nine".