2128528765441 has 8 divisors (see below), whose sum is σ = 2292906234024. Its totient is φ = 1964243366400.

The previous prime is 2128528765399. The next prime is 2128528765453. The reversal of 2128528765441 is 1445678258212.

It can be written as a sum of positive squares in 4 ways, for example, as 122637238416 + 2005891527025 = 350196^2 + 1416295^2 .

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 2128528765441 - 2¹⁷ = 2128528634369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2128528763441) 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, 22969360 + ... + 23061841.

It is an arithmetic number, because the mean of its divisors is an integer number (286613279253).

Almost surely, 2^{2128528765441} is an apocalyptic number.

It is an amenable number.

2128528765441 is a deficient number, since it is larger than the sum of its proper divisors (164377468583).

2128528765441 is a wasteful number, since it uses less digits than its factorization.

2128528765441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46034771.

The product of its digits is 8601600, while the sum is 55.

The spelling of 2128528765441 in words is "two trillion, one hundred twenty-eight billion, five hundred twenty-eight million, seven hundred sixty-five thousand, four hundred forty-one".