128255080525508 has 12 divisors (see below), whose sum is σ = 224459433424380. Its totient is φ = 64123813832832.

The previous prime is 128255080525489. The next prime is 128255080525511. The reversal of 128255080525508 is 805525080552821.

It can be written as a sum of positive squares in 2 ways, for example, as 70263322111684 + 57991758413824 = 8382322^2 + 7615232^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 931530041 + ... + 931667712.

It is an arithmetic number, because the mean of its divisors is an integer number (18704952785365).

Almost surely, 2^{128255080525508} is an apocalyptic number.

It is an amenable number.

128255080525508 is a deficient number, since it is larger than the sum of its proper divisors (96204352898872).

128255080525508 is a wasteful number, since it uses less digits than its factorization.

128255080525508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1863214966 (or 1863214964 counting only the distinct ones).

The product of its (nonzero) digits is 12800000, while the sum is 56.

The spelling of 128255080525508 in words is "one hundred twenty-eight trillion, two hundred fifty-five billion, eighty million, five hundred twenty-five thousand, five hundred eight".