65117568 has 64 divisors (see below), whose sum is σ = 175619520. Its totient is φ = 21373440.

The previous prime is 65117551. The next prime is 65117593. The reversal of 65117568 is 86571156.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24463 + ... + 26993.

It is an arithmetic number, because the mean of its divisors is an integer number (2744055).

Almost surely, 2^65117568 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 65117568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87809760).

65117568 is an abundant number, since it is smaller than the sum of its proper divisors (110501952).

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

65117568 is a wasteful number, since it uses less digits than its factorization.

65117568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2615 (or 2603 counting only the distinct ones).

The product of its digits is 50400, while the sum is 39.

The square root of 65117568 is about 8069.5457121204. The cubic root of 65117568 is about 402.3148445614.

The spelling of 65117568 in words is "sixty-five million, one hundred seventeen thousand, five hundred sixty-eight".