65005644 has 24 divisors (see below), whose sum is σ = 165469248. Its totient is φ = 19698640.

The previous prime is 65005643. The next prime is 65005649. The reversal of 65005644 is 44650056.

It is not an unprimeable number, because it can be changed into a prime (65005643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246102 + ... + 246365.

It is an arithmetic number, because the mean of its divisors is an integer number (6894552).

Almost surely, 2^65005644 is an apocalyptic number.

It is an amenable number.

65005644 is an abundant number, since it is smaller than the sum of its proper divisors (100463604).

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

65005644 is a wasteful number, since it uses less digits than its factorization.

65005644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492485 (or 492483 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 65005644 is about 8062.6077667216. The cubic root of 65005644 is about 402.0842129458.

The spelling of 65005644 in words is "sixty-five million, five thousand, six hundred forty-four".