128331598756 has 81 divisors (see below), whose sum is σ = 238141344609. Its totient is φ = 60510021408.

The previous prime is 128331598739. The next prime is 128331598771. The reversal of 128331598756 is 657895133821.

It is a happy number.

The square root of 128331598756 is 358234.

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

It can be written as a sum of positive squares in only one way, i.e., 114832876900 + 13498721856 = 338870^2 + 116184^2 .

Its product of digits (10886400) is a multiple of the sum of its prime divisors (189).

It is a self number, because there is not a number n which added to its sum of digits gives 128331598756.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1245937801 + ... + 1245937903.

Almost surely, 2^128331598756 is an apocalyptic number.

128331598756 is the 358234-th square number.

It is an amenable number.

128331598756 is a deficient number, since it is larger than the sum of its proper divisors (109809745853).

128331598756 is an equidigital number, since it uses as much as digits as its factorization.

128331598756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378 (or 189 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 58.

The spelling of 128331598756 in words is "one hundred twenty-eight billion, three hundred thirty-one million, five hundred ninety-eight thousand, seven hundred fifty-six".