65844039844 has 24 divisors (see below), whose sum is σ = 126534735936. Its totient is φ = 29730900000.

The previous prime is 65844039823. The next prime is 65844039847. The reversal of 65844039844 is 44893044856.

It is not an unprimeable number, because it can be changed into a prime (65844039847) 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, 4948507 + ... + 4961794.

It is an arithmetic number, because the mean of its divisors is an integer number (5272280664).

Almost surely, 2^65844039844 is an apocalyptic number.

It is an amenable number.

65844039844 is a deficient number, since it is larger than the sum of its proper divisors (60690696092).

65844039844 is a wasteful number, since it uses less digits than its factorization.

65844039844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9910467 (or 9910465 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 55.

The spelling of 65844039844 in words is "sixty-five billion, eight hundred forty-four million, thirty-nine thousand, eight hundred forty-four".