65384617844 has 240 divisors, whose sum is σ = 155080390080. Its totient is φ = 23897825280.

The previous prime is 65384617829. The next prime is 65384617871. The reversal of 65384617844 is 44871648356.

It is a self number, because there is not a number n which added to its sum of digits gives 65384617844.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 102003764 + ... + 102004404.

It is an arithmetic number, because the mean of its divisors is an integer number (646168292).

Almost surely, 2^65384617844 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 65384617844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77540195040).

65384617844 is an abundant number, since it is smaller than the sum of its proper divisors (89695772236).

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

65384617844 is a wasteful number, since it uses less digits than its factorization.

65384617844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748 (or 725 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 56.

The spelling of 65384617844 in words is "sixty-five billion, three hundred eighty-four million, six hundred seventeen thousand, eight hundred forty-four".