64559657 has 2 divisors, whose sum is σ = 64559658. Its totient is φ = 64559656.

The previous prime is 64559647. The next prime is 64559681. The reversal of 64559657 is 75695546.

It is a happy number.

64559657 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., 44943616 + 19616041 = 6704^2 + 4429^2 .

It is a cyclic number.

It is not a de Polignac number, because 64559657 - 2¹⁰ = 64558633 is a prime.

It is not a weakly prime, because it can be changed into another prime (64559647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32279828 + 32279829.

It is an arithmetic number, because the mean of its divisors is an integer number (32279829).

Almost surely, 2^64559657 is an apocalyptic number.

It is an amenable number.

64559657 is a deficient number, since it is larger than the sum of its proper divisors (1).

64559657 is an equidigital number, since it uses as much as digits as its factorization.

64559657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134000, while the sum is 47.

The square root of 64559657 is about 8034.9024262899. The cubic root of 64559657 is about 401.1625698879.

The spelling of 64559657 in words is "sixty-four million, five hundred fifty-nine thousand, six hundred fifty-seven".