5128726915538 has 54 divisors (see below), whose sum is σ = 7959296371959. Its totient is φ = 2478564029592.

The previous prime is 5128726915421. The next prime is 5128726915577. The reversal of 5128726915538 is 8355196278215.

It can be written as a sum of positive squares in only one way, i.e., 2564363457769 + 2564363457769 = 1601363^2 + 1601363^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1601363.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 22998775295 + ... + 22998775517.

Almost surely, 2^{5128726915538} is an apocalyptic number.

5128726915538 is a deficient number, since it is larger than the sum of its proper divisors (2830569456421).

5128726915538 is an frugal number, since it uses more digits than its factorization.

5128726915538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868 (or 435 counting only the distinct ones).

The product of its digits is 36288000, while the sum is 62.

The spelling of 5128726915538 in words is "five trillion, one hundred twenty-eight billion, seven hundred twenty-six million, nine hundred fifteen thousand, five hundred thirty-eight".