2128528765439 has 8 divisors (see below), whose sum is σ = 2133403359552. Its totient is φ = 2123655367680.

The previous prime is 2128528765399. The next prime is 2128528765453. The reversal of 2128528765439 is 9345678258212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2128528765439 - 2¹⁶ = 2128528699903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128528765039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3313199 + ... + 3903119.

It is an arithmetic number, because the mean of its divisors is an integer number (266675419944).

Almost surely, 2^{2128528765439} is an apocalyptic number.

2128528765439 is a deficient number, since it is larger than the sum of its proper divisors (4874594113).

2128528765439 is an equidigital number, since it uses as much as digits as its factorization.

2128528765439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598177.

The product of its digits is 58060800, while the sum is 62.

The spelling of 2128528765439 in words is "two trillion, one hundred twenty-eight billion, five hundred twenty-eight million, seven hundred sixty-five thousand, four hundred thirty-nine".