128286028625 has 8 divisors (see below), whose sum is σ = 160100963880. Its totient is φ = 102628822800.

The previous prime is 128286028613. The next prime is 128286028697. The reversal of 128286028625 is 526820682821.

It can be written as a sum of positive squares in 4 ways, for example, as 1778477584 + 126507551041 = 42172^2 + 355679^2 .

It is not a de Polignac number, because 128286028625 - 2²⁶ = 128218919761 is a prime.

It is a super-3 number, since 3×128286028625³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513143990 + ... + 513144239.

It is an arithmetic number, because the mean of its divisors is an integer number (20012620485).

Almost surely, 2^128286028625 is an apocalyptic number.

It is an amenable number.

128286028625 is a deficient number, since it is larger than the sum of its proper divisors (31814935255).

128286028625 is an equidigital number, since it uses as much as digits as its factorization.

128286028625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026288244 (or 1026288234 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 50.

The spelling of 128286028625 in words is "one hundred twenty-eight billion, two hundred eighty-six million, twenty-eight thousand, six hundred twenty-five".