64320064 has 28 divisors (see below), whose sum is σ = 130356864. Its totient is φ = 31474304.

The previous prime is 64320041. The next prime is 64320077. The reversal of 64320064 is 46002346.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7684 + ... + 13699.

Almost surely, 2^64320064 is an apocalyptic number.

64320064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

64320064 is an abundant number, since it is smaller than the sum of its proper divisors (66036800).

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

64320064 is a wasteful number, since it uses less digits than its factorization.

64320064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21442 (or 21432 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 64320064 is about 8019.9790523417. The cubic root of 64320064 is about 400.6656915224.

The spelling of 64320064 in words is "sixty-four million, three hundred twenty thousand, sixty-four".