561453649 has 2 divisors, whose sum is σ = 561453650. Its totient is φ = 561453648.

The previous prime is 561453643. The next prime is 561453653. The reversal of 561453649 is 946354165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 548262225 + 13191424 = 23415^2 + 3632^2 .

It is a cyclic number.

It is not a de Polignac number, because 561453649 - 2⁷ = 561453521 is a prime.

It is not a weakly prime, because it can be changed into another prime (561453643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280726824 + 280726825.

It is an arithmetic number, because the mean of its divisors is an integer number (280726825).

Almost surely, 2^561453649 is an apocalyptic number.

It is an amenable number.

561453649 is a deficient number, since it is larger than the sum of its proper divisors (1).

561453649 is an equidigital number, since it uses as much as digits as its factorization.

561453649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 43.

The square root of 561453649 is about 23695.0131673312. The cubic root of 561453649 is about 824.9696463886.

The spelling of 561453649 in words is "five hundred sixty-one million, four hundred fifty-three thousand, six hundred forty-nine".