128255080525509 has 16 divisors (see below), whose sum is σ = 195436564463232. Its totient is φ = 73288523212608.

The previous prime is 128255080525489. The next prime is 128255080525511. The reversal of 128255080525509 is 905525080552821.

It is not a de Polignac number, because 128255080525509 - 2²⁹ = 128254543654597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128255080525519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14893387 + ... + 21870599.

It is an arithmetic number, because the mean of its divisors is an integer number (12214785278952).

Almost surely, 2^{128255080525509} is an apocalyptic number.

It is an amenable number.

128255080525509 is a deficient number, since it is larger than the sum of its proper divisors (67181483937723).

128255080525509 is an equidigital number, since it uses as much as digits as its factorization.

128255080525509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7852556.

The product of its (nonzero) digits is 14400000, while the sum is 57.

The spelling of 128255080525509 in words is "one hundred twenty-eight trillion, two hundred fifty-five billion, eighty million, five hundred twenty-five thousand, five hundred nine".