240565725661 has 2 divisors, whose sum is σ = 240565725662. Its totient is φ = 240565725660.

The previous prime is 240565725649. The next prime is 240565725691. The reversal of 240565725661 is 166527565042.

240565725661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240565725625 + 36 = 490475^2 + 6^2 .

It is a cyclic number.

It is not a de Polignac number, because 240565725661 - 2¹¹ = 240565723613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240565725691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120282862830 + 120282862831.

It is an arithmetic number, because the mean of its divisors is an integer number (120282862831).

Almost surely, 2^240565725661 is an apocalyptic number.

It is an amenable number.

240565725661 is a deficient number, since it is larger than the sum of its proper divisors (1).

240565725661 is an equidigital number, since it uses as much as digits as its factorization.

240565725661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024000, while the sum is 49.

The spelling of 240565725661 in words is "two hundred forty billion, five hundred sixty-five million, seven hundred twenty-five thousand, six hundred sixty-one".