64517696928 has 72 divisors (see below), whose sum is σ = 183497932800. Its totient is φ = 21502882944.

The previous prime is 64517696923. The next prime is 64517696939. The reversal of 64517696928 is 82969671546.

64517696928 is a `hidden beast` number, since 6 + 4 + 517 + 6 + 96 + 9 + 28 = 666.

64517696928 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (64517696923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3140193 + ... + 3160671.

It is an arithmetic number, because the mean of its divisors is an integer number (2548582400).

Almost surely, 2^64517696928 is an apocalyptic number.

It is an amenable number.

64517696928 is an abundant number, since it is smaller than the sum of its proper divisors (118980235872).

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

64517696928 is a wasteful number, since it uses less digits than its factorization.

64517696928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31434 (or 31423 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 63.

The spelling of 64517696928 in words is "sixty-four billion, five hundred seventeen million, six hundred ninety-six thousand, nine hundred twenty-eight".