64044909 has 12 divisors (see below), whose sum is σ = 92881152. Its totient is φ = 42525000.

The previous prime is 64044907. The next prime is 64044917. The reversal of 64044909 is 90944046.

64044909 is a `hidden beast` number, since 640 + 4 + 4 + 9 + 0 + 9 = 666.

It is not a de Polignac number, because 64044909 - 2¹ = 64044907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64044907) 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 11 ways as a sum of consecutive naturals, for example, 11917 + ... + 16434.

It is an arithmetic number, because the mean of its divisors is an integer number (7740096).

Almost surely, 2^64044909 is an apocalyptic number.

It is an amenable number.

64044909 is a deficient number, since it is larger than the sum of its proper divisors (28836243).

64044909 is a wasteful number, since it uses less digits than its factorization.

64044909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28608 (or 28605 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 64044909 is about 8002.8063202854. The cubic root of 64044909 is about 400.0935385413.

The spelling of 64044909 in words is "sixty-four million, forty-four thousand, nine hundred nine".