64878064 has 10 divisors (see below), whose sum is σ = 125701280. Its totient is φ = 32439024.

The previous prime is 64878061. The next prime is 64878083. The reversal of 64878064 is 46087846.

It is a self number, because there is not a number n which added to its sum of digits gives 64878064.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64878061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2027424 + ... + 2027455.

It is an arithmetic number, because the mean of its divisors is an integer number (12570128).

Almost surely, 2^64878064 is an apocalyptic number.

It is an amenable number.

64878064 is a deficient number, since it is larger than the sum of its proper divisors (60823216).

64878064 is a wasteful number, since it uses less digits than its factorization.

64878064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4054887 (or 4054881 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 64878064 is about 8054.6920487378. The cubic root of 64878064 is about 401.8209973415.

The spelling of 64878064 in words is "sixty-four million, eight hundred seventy-eight thousand, sixty-four".