240842108257 has 2 divisors, whose sum is σ = 240842108258. Its totient is φ = 240842108256.

The previous prime is 240842108251. The next prime is 240842108371. The reversal of 240842108257 is 752801248042.

240842108257 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., 229900111441 + 10941996816 = 479479^2 + 104604^2 .

It is a cyclic number.

It is not a de Polignac number, because 240842108257 - 2²⁷ = 240707890529 is a prime.

It is a super-2 number, since 2×240842108257² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (240842108251) 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, 120421054128 + 120421054129.

It is an arithmetic number, because the mean of its divisors is an integer number (120421054129).

Almost surely, 2^240842108257 is an apocalyptic number.

It is an amenable number.

240842108257 is a deficient number, since it is larger than the sum of its proper divisors (1).

240842108257 is an equidigital number, since it uses as much as digits as its factorization.

240842108257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 286720, while the sum is 43.

The spelling of 240842108257 in words is "two hundred forty billion, eight hundred forty-two million, one hundred eight thousand, two hundred fifty-seven".