65009568 has 72 divisors (see below), whose sum is σ = 184832928. Its totient is φ = 19997952.

The previous prime is 65009543. The next prime is 65009587. The reversal of 65009568 is 86590056.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14221 + ... + 18227.

It is an arithmetic number, because the mean of its divisors is an integer number (2567124).

Almost surely, 2^65009568 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 65009568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92416464).

65009568 is an abundant number, since it is smaller than the sum of its proper divisors (119823360).

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

65009568 is a wasteful number, since it uses less digits than its factorization.

65009568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4046 (or 4025 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 65009568 is about 8062.8511086340. The cubic root of 65009568 is about 402.0923032520.

The spelling of 65009568 in words is "sixty-five million, nine thousand, five hundred sixty-eight".