64044561 has 8 divisors (see below), whose sum is σ = 97591744. Its totient is φ = 36596880.

The previous prime is 64044553. The next prime is 64044599. The reversal of 64044561 is 16544046.

64044561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 64044561 - 2³ = 64044553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64044361) 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 7 ways as a sum of consecutive naturals, for example, 1524850 + ... + 1524891.

It is an arithmetic number, because the mean of its divisors is an integer number (12198968).

Almost surely, 2^64044561 is an apocalyptic number.

It is an amenable number.

64044561 is a deficient number, since it is larger than the sum of its proper divisors (33547183).

64044561 is a wasteful number, since it uses less digits than its factorization.

64044561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3049751.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 64044561 is about 8002.7845778829. The cubic root of 64044561 is about 400.0928138790.

The spelling of 64044561 in words is "sixty-four million, forty-four thousand, five hundred sixty-one".