558749561 has 2 divisors, whose sum is σ = 558749562. Its totient is φ = 558749560.

The previous prime is 558749551. The next prime is 558749563. The reversal of 558749561 is 165947855.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 519612025 + 39137536 = 22795^2 + 6256^2 .

It is a cyclic number.

It is not a de Polignac number, because 558749561 - 2¹⁴ = 558733177 is a prime.

Together with 558749563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (558749563) 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, 279374780 + 279374781.

It is an arithmetic number, because the mean of its divisors is an integer number (279374781).

Almost surely, 2^558749561 is an apocalyptic number.

It is an amenable number.

558749561 is a deficient number, since it is larger than the sum of its proper divisors (1).

558749561 is an equidigital number, since it uses as much as digits as its factorization.

558749561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512000, while the sum is 50.

The square root of 558749561 is about 23637.8840212063. The cubic root of 558749561 is about 823.6431008703.

The spelling of 558749561 in words is "five hundred fifty-eight million, seven hundred forty-nine thousand, five hundred sixty-one".