561440359 has 2 divisors, whose sum is σ = 561440360. Its totient is φ = 561440358.

The previous prime is 561440339. The next prime is 561440389. The reversal of 561440359 is 953044165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561440359 - 2¹³ = 561432167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561440309) 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, 280720179 + 280720180.

It is an arithmetic number, because the mean of its divisors is an integer number (280720180).

Almost surely, 2^561440359 is an apocalyptic number.

561440359 is a deficient number, since it is larger than the sum of its proper divisors (1).

561440359 is an equidigital number, since it uses as much as digits as its factorization.

561440359 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 561440359 is about 23694.7327269163. The cubic root of 561440359 is about 824.9631371347.

The spelling of 561440359 in words is "five hundred sixty-one million, four hundred forty thousand, three hundred fifty-nine".