64643064 has 64 divisors (see below), whose sum is σ = 169827840. Its totient is φ = 20465280.

The previous prime is 64643021. The next prime is 64643069. The reversal of 64643064 is 46034646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64643069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99589 + ... + 100235.

It is an arithmetic number, because the mean of its divisors is an integer number (2653560).

Almost surely, 2^64643064 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 64643064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84913920).

64643064 is an abundant number, since it is smaller than the sum of its proper divisors (105184776).

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

64643064 is a wasteful number, since it uses less digits than its factorization.

64643064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860 (or 856 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 64643064 is about 8040.0910442606. The cubic root of 64643064 is about 401.3352544459.

The spelling of 64643064 in words is "sixty-four million, six hundred forty-three thousand, sixty-four".