65008944864 has 72 divisors (see below), whose sum is σ = 185124073680. Its totient is φ = 21639771648.

The previous prime is 65008944863. The next prime is 65008944899. The reversal of 65008944864 is 46844980056.

65008944864 is a `hidden beast` number, since 6 + 500 + 8 + 94 + 48 + 6 + 4 = 666.

65008944864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (72).

It is a self number, because there is not a number n which added to its sum of digits gives 65008944864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65008944863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54132 + ... + 364620.

It is an arithmetic number, because the mean of its divisors is an integer number (2571167690).

Almost surely, 2^65008944864 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 65008944864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92562036840).

65008944864 is an abundant number, since it is smaller than the sum of its proper divisors (120115128816).

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

65008944864 is a wasteful number, since it uses less digits than its factorization.

65008944864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311232 (or 311221 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 54.

The spelling of 65008944864 in words is "sixty-five billion, eight million, nine hundred forty-four thousand, eight hundred sixty-four".