128860669271025 has 36 divisors (see below), whose sum is σ = 230847649341660. Its totient is φ = 68712626409600.

The previous prime is 128860669271023. The next prime is 128860669271041. The reversal of 128860669271025 is 520172966068821.

128860669271025 is a `hidden beast` number, since 1 + 2 + 8 + 8 + 606 + 6 + 9 + 2 + 7 + 10 + 2 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 10325277610209 + 118535391660816 = 3213297^2 + 10887396^2 .

It is not a de Polignac number, because 128860669271025 - 2¹ = 128860669271023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128860669271021) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 53246430 + ... + 55613879.

It is an arithmetic number, because the mean of its divisors is an integer number (6412434703935).

Almost surely, 2^{128860669271025} is an apocalyptic number.

128860669271025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128860669271025 is a deficient number, since it is larger than the sum of its proper divisors (101986980070635).

128860669271025 is a wasteful number, since it uses less digits than its factorization.

128860669271025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108865586 (or 108865578 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 63.

The spelling of 128860669271025 in words is "one hundred twenty-eight trillion, eight hundred sixty billion, six hundred sixty-nine million, two hundred seventy-one thousand, twenty-five".