2128528765398 has 32 divisors (see below), whose sum is σ = 4866039834624. Its totient is φ = 608047172352.

The previous prime is 2128528765379. The next prime is 2128528765399. The reversal of 2128528765398 is 8935678258212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128528765399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4080390 + ... + 4572377.

It is an arithmetic number, because the mean of its divisors is an integer number (152063744832).

Almost surely, 2^{2128528765398} is an apocalyptic number.

2128528765398 is an abundant number, since it is smaller than the sum of its proper divisors (2737511069226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2128528765398 is a wasteful number, since it uses less digits than its factorization.

2128528765398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8658636.

The product of its digits is 116121600, while the sum is 66.

The spelling of 2128528765398 in words is "two trillion, one hundred twenty-eight billion, five hundred twenty-eight million, seven hundred sixty-five thousand, three hundred ninety-eight".