2164644843243 has 16 divisors (see below), whose sum is σ = 2916136509216. Its totient is φ = 1428126796800.

The previous prime is 2164644843203. The next prime is 2164644843281. The reversal of 2164644843243 is 3423484464612.

It is not a de Polignac number, because 2164644843243 - 2¹⁴ = 2164644826859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2164644843203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4415293 + ... + 4880993.

It is an arithmetic number, because the mean of its divisors is an integer number (182258531826).

Almost surely, 2^{2164644843243} is an apocalyptic number.

2164644843243 is a deficient number, since it is larger than the sum of its proper divisors (751491665973).

2164644843243 is a wasteful number, since it uses less digits than its factorization.

2164644843243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481774.

The product of its digits is 10616832, while the sum is 51.

The spelling of 2164644843243 in words is "two trillion, one hundred sixty-four billion, six hundred forty-four million, eight hundred forty-three thousand, two hundred forty-three".