128504325625 has 45 divisors (see below), whose sum is σ = 174039195099. Its totient is φ = 94809468000.

The previous prime is 128504325619. The next prime is 128504325661. The reversal of 128504325625 is 526523405821.

The square root of 128504325625 is 358475.

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

It can be written as a sum of positive squares in 7 ways, for example, as 126927600361 + 1576725264 = 356269^2 + 39708^2 .

It is not a de Polignac number, because 128504325625 - 2⁷ = 128504325497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 116503824 + ... + 116504926.

Almost surely, 2^128504325625 is an apocalyptic number.

128504325625 is the 358475-th square number.

128504325625 is the 179238-th centered octagonal number.

It is an amenable number.

128504325625 is a deficient number, since it is larger than the sum of its proper divisors (45534869474).

128504325625 is an frugal number, since it uses more digits than its factorization.

128504325625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2252 (or 1121 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 43.

The spelling of 128504325625 in words is "one hundred twenty-eight billion, five hundred four million, three hundred twenty-five thousand, six hundred twenty-five".