64556512032 has 48 divisors (see below), whose sum is σ = 169593661440. Its totient is φ = 21501971712.

The previous prime is 64556512001. The next prime is 64556512043. The reversal of 64556512032 is 23021565546.

64556512032 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 (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140103 + ... + 385670.

It is an arithmetic number, because the mean of its divisors is an integer number (3533201280).

Almost surely, 2^64556512032 is an apocalyptic number.

It is an amenable number.

64556512032 is an abundant number, since it is smaller than the sum of its proper divisors (105037149408).

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

64556512032 is a wasteful number, since it uses less digits than its factorization.

64556512032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527065 (or 527057 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 39.

The spelling of 64556512032 in words is "sixty-four billion, five hundred fifty-six million, five hundred twelve thousand, thirty-two".