557639561 has 2 divisors, whose sum is σ = 557639562. Its totient is φ = 557639560.

The previous prime is 557639539. The next prime is 557639587. The reversal of 557639561 is 165936755.

557639561 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., 296493961 + 261145600 = 17219^2 + 16160^2 .

It is a cyclic number.

It is not a de Polignac number, because 557639561 - 2⁶ = 557639497 is a prime.

It is not a weakly prime, because it can be changed into another prime (557639261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278819780 + 278819781.

It is an arithmetic number, because the mean of its divisors is an integer number (278819781).

Almost surely, 2^557639561 is an apocalyptic number.

It is an amenable number.

557639561 is a deficient number, since it is larger than the sum of its proper divisors (1).

557639561 is an equidigital number, since it uses as much as digits as its factorization.

557639561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 850500, while the sum is 47.

The square root of 557639561 is about 23614.3930898086. The cubic root of 557639561 is about 823.0973286791.

The spelling of 557639561 in words is "five hundred fifty-seven million, six hundred thirty-nine thousand, five hundred sixty-one".