64329390528 has 56 divisors (see below), whose sum is σ = 183297533328. Its totient is φ = 19793657856.

The previous prime is 64329390497. The next prime is 64329390571. The reversal of 64329390528 is 82509392346.

It is a happy number.

64329390528 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64329390528² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 12884001 + ... + 12888992.

It is an arithmetic number, because the mean of its divisors is an integer number (3273170238).

Almost surely, 2^64329390528 is an apocalyptic number.

It is an amenable number.

64329390528 is an abundant number, since it is smaller than the sum of its proper divisors (118968142800).

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

64329390528 is a wasteful number, since it uses less digits than its factorization.

64329390528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25773021 (or 25773011 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 51.

The spelling of 64329390528 in words is "sixty-four billion, three hundred twenty-nine million, three hundred ninety thousand, five hundred twenty-eight".