128411139025 has 81 divisors (see below), whose sum is σ = 178403692761. Its totient is φ = 91644583680.

The previous prime is 128411139013. The next prime is 128411139029. The reversal of 128411139025 is 520931114821.

The square root of 128411139025 is 358345.

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

It can be written as a sum of positive squares in 40 ways, for example, as 97429506769 + 30981632256 = 312137^2 + 176016^2 .

It is a de Polignac number, because none of the positive numbers 2^k-128411139025 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128411139029) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 861819651 + ... + 861819799.

Almost surely, 2^128411139025 is an apocalyptic number.

128411139025 is the 358345-th square number.

128411139025 is the 179173-rd centered octagonal number.

It is an amenable number.

128411139025 is a deficient number, since it is larger than the sum of its proper divisors (49992553736).

128411139025 is an equidigital number, since it uses as much as digits as its factorization.

128411139025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 37.

The spelling of 128411139025 in words is "one hundred twenty-eight billion, four hundred eleven million, one hundred thirty-nine thousand, twenty-five".