64320016 has 40 divisors (see below), whose sum is σ = 132045120. Its totient is φ = 30266496.

The previous prime is 64320013. The next prime is 64320037. The reversal of 64320016 is 61002346.

It is not an unprimeable number, because it can be changed into a prime (64320013) 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, 51981 + ... + 53203.

It is an arithmetic number, because the mean of its divisors is an integer number (3301128).

Almost surely, 2^64320016 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 64320016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66022560).

64320016 is an abundant number, since it is smaller than the sum of its proper divisors (67725104).

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

64320016 is a wasteful number, since it uses less digits than its factorization.

64320016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423 (or 1417 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 64320016 is about 8019.9760598146. The cubic root of 64320016 is about 400.6655918544.

The spelling of 64320016 in words is "sixty-four million, three hundred twenty thousand, sixteen".