128267841025 has 27 divisors (see below), whose sum is σ = 161178266179. Its totient is φ = 101260484720.

The previous prime is 128267841001. The next prime is 128267841041. The reversal of 128267841025 is 520148762821.

The square root of 128267841025 is 358145.

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., 46176422769 + 82091418256 = 214887^2 + 286516^2 .

It is not a de Polignac number, because 128267841025 - 2²⁹ = 127730970113 is a prime.

It is a Duffinian number.

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, 148629744 + ... + 148630606.

Almost surely, 2^128267841025 is an apocalyptic number.

128267841025 is the 358145-th square number.

128267841025 is the 179073-rd centered octagonal number.

It is an amenable number.

128267841025 is a deficient number, since it is larger than the sum of its proper divisors (32910425154).

128267841025 is an frugal number, since it uses more digits than its factorization.

128267841025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902 (or 951 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 46.

The spelling of 128267841025 in words is "one hundred twenty-eight billion, two hundred sixty-seven million, eight hundred forty-one thousand, twenty-five".