2128668453243 has 6 divisors (see below), whose sum is σ = 3074743321364. Its totient is φ = 1419112302156.

The previous prime is 2128668453173. The next prime is 2128668453259. The reversal of 2128668453243 is 3423548668212.

2128668453243 is a `hidden beast` number, since 2 + 1 + 2 + 8 + 6 + 68 + 4 + 532 + 43 = 666.

It is not a de Polignac number, because 2128668453243 - 2²² = 2128664258939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2128668453243.

It is not an unprimeable number, because it can be changed into a prime (2128668454243) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 118259358505 + ... + 118259358522.

Almost surely, 2^{2128668453243} is an apocalyptic number.

2128668453243 is a deficient number, since it is larger than the sum of its proper divisors (946074868121).

2128668453243 is a wasteful number, since it uses less digits than its factorization.

2128668453243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236518717033 (or 236518717030 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 54.

The spelling of 2128668453243 in words is "two trillion, one hundred twenty-eight billion, six hundred sixty-eight million, four hundred fifty-three thousand, two hundred forty-three".