64328012672 has 128 divisors (see below), whose sum is σ = 160351246080. Its totient is φ = 24972595200.

The previous prime is 64328012557. The next prime is 64328012677. The reversal of 64328012672 is 27621082346.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64328012677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2757923 + ... + 2781149.

It is an arithmetic number, because the mean of its divisors is an integer number (1252744110).

Almost surely, 2^64328012672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64328012672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80175623040).

64328012672 is an abundant number, since it is smaller than the sum of its proper divisors (96023233408).

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

64328012672 is a wasteful number, since it uses less digits than its factorization.

64328012672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23540 (or 23528 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 41.

The spelling of 64328012672 in words is "sixty-four billion, three hundred twenty-eight million, twelve thousand, six hundred seventy-two".