561489553 has 2 divisors, whose sum is σ = 561489554. Its totient is φ = 561489552.

The previous prime is 561489521. The next prime is 561489559. The reversal of 561489553 is 355984165.

561489553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 286692624 + 274796929 = 16932^2 + 16577^2 .

It is a cyclic number.

It is not a de Polignac number, because 561489553 - 2⁵ = 561489521 is a prime.

It is not a weakly prime, because it can be changed into another prime (561489559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280744776 + 280744777.

It is an arithmetic number, because the mean of its divisors is an integer number (280744777).

Almost surely, 2^561489553 is an apocalyptic number.

It is an amenable number.

561489553 is a deficient number, since it is larger than the sum of its proper divisors (1).

561489553 is an equidigital number, since it uses as much as digits as its factorization.

561489553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648000, while the sum is 46.

The square root of 561489553 is about 23695.7707829899. The cubic root of 561489553 is about 824.9872311461.

The spelling of 561489553 in words is "five hundred sixty-one million, four hundred eighty-nine thousand, five hundred fifty-three".