64568449 has 4 divisors (see below), whose sum is σ = 70438320. Its totient is φ = 58698580.

The previous prime is 64568447. The next prime is 64568473. The reversal of 64568449 is 94486546.

64568449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64568449 - 2¹ = 64568447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64568399 and 64568408.

It is not an unprimeable number, because it can be changed into a prime (64568447) 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 in 3 ways as a sum of consecutive naturals, for example, 2934919 + ... + 2934940.

It is an arithmetic number, because the mean of its divisors is an integer number (17609580).

Almost surely, 2^64568449 is an apocalyptic number.

It is an amenable number.

64568449 is a deficient number, since it is larger than the sum of its proper divisors (5869871).

64568449 is a wasteful number, since it uses less digits than its factorization.

64568449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5869870.

The product of its digits is 829440, while the sum is 46.

The square root of 64568449 is about 8035.4495207176. The cubic root of 64568449 is about 401.1807797184.

The spelling of 64568449 in words is "sixty-four million, five hundred sixty-eight thousand, four hundred forty-nine".