128291479684 has 9 divisors (see below), whose sum is σ = 224511343077. Its totient is φ = 64145381664.

The previous prime is 128291479663. The next prime is 128291479733. The reversal of 128291479684 is 486974192821.

The square root of 128291479684 is 358178.

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., 52247902084 + 76043577600 = 228578^2 + 275760^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 626812 + ... + 805900.

Almost surely, 2^128291479684 is an apocalyptic number.

128291479684 is the 358178-th square number.

It is an amenable number.

128291479684 is a deficient number, since it is larger than the sum of its proper divisors (96219863393).

128291479684 is an frugal number, since it uses more digits than its factorization.

128291479684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358182 (or 179091 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 61.

The spelling of 128291479684 in words is "one hundred twenty-eight billion, two hundred ninety-one million, four hundred seventy-nine thousand, six hundred eighty-four".