2128528765399 has 2 divisors, whose sum is σ = 2128528765400. Its totient is φ = 2128528765398.

The previous prime is 2128528765379. The next prime is 2128528765453. The reversal of 2128528765399 is 9935678258212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2128528765399 - 2¹⁹ = 2128528241111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2128528765369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064264382699 + 1064264382700.

It is an arithmetic number, because the mean of its divisors is an integer number (1064264382700).

Almost surely, 2^{2128528765399} is an apocalyptic number.

2128528765399 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128528765399 is an equidigital number, since it uses as much as digits as its factorization.

2128528765399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 130636800, while the sum is 67.

The spelling of 2128528765399 in words is "two trillion, one hundred twenty-eight billion, five hundred twenty-eight million, seven hundred sixty-five thousand, three hundred ninety-nine".