2128435895056 has 45 divisors (see below), whose sum is σ = 4137559649503. Its totient is φ = 1060690288640.

The previous prime is 2128435894957. The next prime is 2128435895059. The reversal of 2128435895056 is 6505985348212.

The square root of 2128435895056 is 1458916.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 21525584656 + 2106910310400 = 146716^2 + 1451520^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2128435895059) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3320492496 + ... + 3320493136.

Almost surely, 2^{2128435895056} is an apocalyptic number.

2128435895056 is the 1458916-th square number.

It is an amenable number.

2128435895056 is a deficient number, since it is larger than the sum of its proper divisors (2009123754447).

2128435895056 is an frugal number, since it uses more digits than its factorization.

2128435895056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2428 (or 1212 counting only the distinct ones).

The product of its (nonzero) digits is 20736000, while the sum is 58.

The spelling of 2128435895056 in words is "two trillion, one hundred twenty-eight billion, four hundred thirty-five million, eight hundred ninety-five thousand, fifty-six".