65044644 has 96 divisors (see below), whose sum is σ = 183085056. Its totient is φ = 17571840.

The previous prime is 65044643. The next prime is 65044649. The reversal of 65044644 is 44644056.

It is not an unprimeable number, because it can be changed into a prime (65044643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 252964 + ... + 253220.

It is an arithmetic number, because the mean of its divisors is an integer number (1907136).

Almost surely, 2^65044644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65044644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91542528).

65044644 is an abundant number, since it is smaller than the sum of its proper divisors (118040412).

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

65044644 is a wasteful number, since it uses less digits than its factorization.

65044644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425 (or 423 counting only the distinct ones).

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

The square root of 65044644 is about 8065.0259763996. The cubic root of 65044644 is about 402.1646067311.

The spelling of 65044644 in words is "sixty-five million, forty-four thousand, six hundred forty-four".