128843666704 has 45 divisors (see below), whose sum is σ = 263520571383. Its totient is φ = 61018288416.

The previous prime is 128843666683. The next prime is 128843666713. The reversal of 128843666704 is 407666348821.

It is a happy number.

The square root of 128843666704 is 358948.

It is a perfect power (a square), and thus also a powerful number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 27277687 + ... + 27282409.

Almost surely, 2^128843666704 is an apocalyptic number.

128843666704 is the 358948-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128843666704

128843666704 is an abundant number, since it is smaller than the sum of its proper divisors (134676904679).

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

128843666704 is an frugal number, since it uses more digits than its factorization.

128843666704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9492 (or 4744 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 55.

The spelling of 128843666704 in words is "one hundred twenty-eight billion, eight hundred forty-three million, six hundred sixty-six thousand, seven hundred four".