64716768 has 36 divisors (see below), whose sum is σ = 184039128. Its totient is φ = 21572160.

The previous prime is 64716761. The next prime is 64716781. The reversal of 64716768 is 86761746.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64716761) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 112068 + ... + 112643.

It is an arithmetic number, because the mean of its divisors is an integer number (5112198).

Almost surely, 2^64716768 is an apocalyptic number.

It is an amenable number.

64716768 is an abundant number, since it is smaller than the sum of its proper divisors (119322360).

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

64716768 is a wasteful number, since it uses less digits than its factorization.

64716768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224727 (or 224716 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 64716768 is about 8044.6732686915. The cubic root of 64716768 is about 401.4877264814.

The spelling of 64716768 in words is "sixty-four million, seven hundred sixteen thousand, seven hundred sixty-eight".