64524409 has 4 divisors (see below), whose sum is σ = 64610404. Its totient is φ = 64438416.

The previous prime is 64524389. The next prime is 64524413. The reversal of 64524409 is 90442546.

64524409 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.

It can be written as a sum of positive squares in 2 ways, for example, as 41990400 + 22534009 = 6480^2 + 4747^2 .

It is a cyclic number.

It is not a de Polignac number, because 64524409 - 2⁷ = 64524281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64524419) 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, 41862 + ... + 43375.

It is an arithmetic number, because the mean of its divisors is an integer number (16152601).

Almost surely, 2^64524409 is an apocalyptic number.

It is an amenable number.

64524409 is a deficient number, since it is larger than the sum of its proper divisors (85995).

64524409 is an equidigital number, since it uses as much as digits as its factorization.

64524409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85994.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 64524409 is about 8032.7086963240. The cubic root of 64524409 is about 401.0895482668.

The spelling of 64524409 in words is "sixty-four million, five hundred twenty-four thousand, four hundred nine".