240054520243561 has 2 divisors, whose sum is σ = 240054520243562. Its totient is φ = 240054520243560.

The previous prime is 240054520243553. The next prime is 240054520243583. The reversal of 240054520243561 is 165342025450042.

240054520243561 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., 228324792576400 + 11729727667161 = 15110420^2 + 3424869^2 .

It is a cyclic number.

It is not a de Polignac number, because 240054520243561 - 2³ = 240054520243553 is a prime.

It is not a weakly prime, because it can be changed into another prime (240054520243501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120027260121780 + 120027260121781.

It is an arithmetic number, because the mean of its divisors is an integer number (120027260121781).

Almost surely, 2^{240054520243561} is an apocalyptic number.

It is an amenable number.

240054520243561 is a deficient number, since it is larger than the sum of its proper divisors (1).

240054520243561 is an equidigital number, since it uses as much as digits as its factorization.

240054520243561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152000, while the sum is 43.

The spelling of 240054520243561 in words is "two hundred forty trillion, fifty-four billion, five hundred twenty million, two hundred forty-three thousand, five hundred sixty-one".