240164933489561 has 2 divisors, whose sum is σ = 240164933489562. Its totient is φ = 240164933489560.

The previous prime is 240164933489557. The next prime is 240164933489573. The reversal of 240164933489561 is 165984339461042.

240164933489561 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., 235400928813961 + 4764004675600 = 15342781^2 + 2182660^2 .

It is a cyclic number.

It is not a de Polignac number, because 240164933489561 - 2² = 240164933489557 is a prime.

It is not a weakly prime, because it can be changed into another prime (240164933489161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120082466744780 + 120082466744781.

It is an arithmetic number, because the mean of its divisors is an integer number (120082466744781).

Almost surely, 2^{240164933489561} is an apocalyptic number.

It is an amenable number.

240164933489561 is a deficient number, since it is larger than the sum of its proper divisors (1).

240164933489561 is an equidigital number, since it uses as much as digits as its factorization.

240164933489561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 134369280, while the sum is 65.

The spelling of 240164933489561 in words is "two hundred forty trillion, one hundred sixty-four billion, nine hundred thirty-three million, four hundred eighty-nine thousand, five hundred sixty-one".