64544407 has 8 divisors (see below), whose sum is σ = 66880080. Its totient is φ = 62250240.

The previous prime is 64544351. The next prime is 64544413. The reversal of 64544407 is 70444546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64544407 - 2¹⁹ = 64020119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64544107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7194 + ... + 13447.

It is an arithmetic number, because the mean of its divisors is an integer number (8360010).

Almost surely, 2^64544407 is an apocalyptic number.

64544407 is a deficient number, since it is larger than the sum of its proper divisors (2335673).

64544407 is a wasteful number, since it uses less digits than its factorization.

64544407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20753.

The product of its (nonzero) digits is 53760, while the sum is 34.

The square root of 64544407 is about 8033.9533854759. The cubic root of 64544407 is about 401.1309804442.

The spelling of 64544407 in words is "sixty-four million, five hundred forty-four thousand, four hundred seven".