564451649 has 2 divisors, whose sum is σ = 564451650. Its totient is φ = 564451648.

The previous prime is 564451631. The next prime is 564451651. The reversal of 564451649 is 946154465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 392317249 + 172134400 = 19807^2 + 13120^2 .

It is a cyclic number.

It is not a de Polignac number, because 564451649 - 2¹² = 564447553 is a prime.

Together with 564451651, 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 (564451249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282225824 + 282225825.

It is an arithmetic number, because the mean of its divisors is an integer number (282225825).

Almost surely, 2^564451649 is an apocalyptic number.

It is an amenable number.

564451649 is a deficient number, since it is larger than the sum of its proper divisors (1).

564451649 is an equidigital number, since it uses as much as digits as its factorization.

564451649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 44.

The square root of 564451649 is about 23758.1911979847. The cubic root of 564451649 is about 826.4354069517.

The spelling of 564451649 in words is "five hundred sixty-four million, four hundred fifty-one thousand, six hundred forty-nine".