64315664 has 40 divisors (see below), whose sum is σ = 144841920. Its totient is φ = 27093888.

The previous prime is 64315663. The next prime is 64315673. The reversal of 64315664 is 46651346.

It is not an unprimeable number, because it can be changed into a prime (64315661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1742 + ... + 11474.

It is an arithmetic number, because the mean of its divisors is an integer number (3621048).

Almost surely, 2^64315664 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 64315664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72420960).

64315664 is an abundant number, since it is smaller than the sum of its proper divisors (80526256).

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

64315664 is a wasteful number, since it uses less digits than its factorization.

64315664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9807 (or 9801 counting only the distinct ones).

The product of its digits is 51840, while the sum is 35.

The square root of 64315664 is about 8019.7047327193. The cubic root of 64315664 is about 400.6565550823.

The spelling of 64315664 in words is "sixty-four million, three hundred fifteen thousand, six hundred sixty-four".