2163320641 has 4 divisors (see below), whose sum is σ = 2163415252. Its totient is φ = 2163226032.

The previous prime is 2163320573. The next prime is 2163320651. The reversal of 2163320641 is 1460233612.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 225120016 + 1938200625 = 15004^2 + 44025^2 .

It is a cyclic number.

It is not a de Polignac number, because 2163320641 - 2¹⁷ = 2163189569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2163320651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10711 + ... + 66643.

It is an arithmetic number, because the mean of its divisors is an integer number (540853813).

Almost surely, 2^2163320641 is an apocalyptic number.

It is an amenable number.

2163320641 is a deficient number, since it is larger than the sum of its proper divisors (94611).

2163320641 is an equidigital number, since it uses as much as digits as its factorization.

2163320641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94610.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 2163320641 is about 46511.5108440911. The cubic root of 2163320641 is about 1293.3228919089.

The spelling of 2163320641 in words is "two billion, one hundred sixty-three million, three hundred twenty thousand, six hundred forty-one".