65217568 has 48 divisors (see below), whose sum is σ = 139116096. Its totient is φ = 29917440.

The previous prime is 65217563. The next prime is 65217589. The reversal of 65217568 is 86571256.

It is a self number, because there is not a number n which added to its sum of digits gives 65217568.

It is not an unprimeable number, because it can be changed into a prime (65217563) 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, 87405 + ... + 88147.

It is an arithmetic number, because the mean of its divisors is an integer number (2898252).

Almost surely, 2^65217568 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 65217568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69558048).

65217568 is an abundant number, since it is smaller than the sum of its proper divisors (73898528).

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

65217568 is a wasteful number, since it uses less digits than its factorization.

65217568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977 (or 969 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The square root of 65217568 is about 8075.7394707853. The cubic root of 65217568 is about 402.5206820385.

The spelling of 65217568 in words is "sixty-five million, two hundred seventeen thousand, five hundred sixty-eight".