64505449 has 2 divisors, whose sum is σ = 64505450. Its totient is φ = 64505448.

The previous prime is 64505447. The next prime is 64505453. The reversal of 64505449 is 94450546.

64505449 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., 59397849 + 5107600 = 7707^2 + 2260^2 .

It is a cyclic number.

It is not a de Polignac number, because 64505449 - 2¹ = 64505447 is a prime.

Together with 64505447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (64505447) 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, 32252724 + 32252725.

It is an arithmetic number, because the mean of its divisors is an integer number (32252725).

Almost surely, 2^64505449 is an apocalyptic number.

It is an amenable number.

64505449 is a deficient number, since it is larger than the sum of its proper divisors (1).

64505449 is an equidigital number, since it uses as much as digits as its factorization.

64505449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 64505449 is about 8031.5284348622. The cubic root of 64505449 is about 401.0502587280.

The spelling of 64505449 in words is "sixty-four million, five hundred five thousand, four hundred forty-nine".