65644044 has 24 divisors (see below), whose sum is σ = 155328768. Its totient is φ = 21572880.

The previous prime is 65644039. The next prime is 65644057. The reversal of 65644044 is 44044656.

65644044 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 65643996 and 65644014.

It is an unprimeable number.

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, 37672 + ... + 39375.

It is an arithmetic number, because the mean of its divisors is an integer number (6472032).

Almost surely, 2^65644044 is an apocalyptic number.

It is an amenable number.

65644044 is an abundant number, since it is smaller than the sum of its proper divisors (89684724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65644044 is a wasteful number, since it uses less digits than its factorization.

65644044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77125 (or 77123 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 33.

The square root of 65644044 is about 8102.1012089457. The cubic root of 65644044 is about 403.3961750470.

The spelling of 65644044 in words is "sixty-five million, six hundred forty-four thousand, forty-four".