7664128344 has 96 divisors (see below), whose sum is σ = 21867955200. Its totient is φ = 2418206400.

The previous prime is 7664128321. The next prime is 7664128369. The reversal of 7664128344 is 4438214667.

It is a self number, because there is not a number n which added to its sum of digits gives 7664128344.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3214977 + ... + 3217359.

It is an arithmetic number, because the mean of its divisors is an integer number (227791200).

Almost surely, 2^7664128344 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 7664128344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10933977600).

7664128344 is an abundant number, since it is smaller than the sum of its proper divisors (14203826856).

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

7664128344 is a wasteful number, since it uses less digits than its factorization.

7664128344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4765 (or 4758 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The square root of 7664128344 is about 87545.0075332683. The cubic root of 7664128344 is about 1971.6095947015.

The spelling of 7664128344 in words is "seven billion, six hundred sixty-four million, one hundred twenty-eight thousand, three hundred forty-four".