13128520111385 has 96 divisors (see below), whose sum is σ = 19944726100992. Its totient is φ = 8238680432640.

The previous prime is 13128520111381. The next prime is 13128520111391. The reversal of 13128520111385 is 58311102582131.

13128520111385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13128520111385 - 2² = 13128520111381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13128520111381) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 39773825 + ... + 40102545.

It is an arithmetic number, because the mean of its divisors is an integer number (207757563552).

Almost surely, 2^{13128520111385} is an apocalyptic number.

It is an amenable number.

13128520111385 is a deficient number, since it is larger than the sum of its proper divisors (6816205989607).

13128520111385 is a wasteful number, since it uses less digits than its factorization.

13128520111385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329023 (or 329016 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 41.

The spelling of 13128520111385 in words is "thirteen trillion, one hundred twenty-eight billion, five hundred twenty million, one hundred eleven thousand, three hundred eighty-five".