2163668609 has 2 divisors, whose sum is σ = 2163668610. Its totient is φ = 2163668608.

The previous prime is 2163668603. The next prime is 2163668621. The reversal of 2163668609 is 9068663612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1332615025 + 831053584 = 36505^2 + 28828^2 .

It is a cyclic number.

It is not a de Polignac number, because 2163668609 - 2⁴ = 2163668593 is a prime.

It is not a weakly prime, because it can be changed into another prime (2163668603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1081834304 + 1081834305.

It is an arithmetic number, because the mean of its divisors is an integer number (1081834305).

Almost surely, 2^2163668609 is an apocalyptic number.

It is an amenable number.

2163668609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2163668609 is an equidigital number, since it uses as much as digits as its factorization.

2163668609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 47.

The square root of 2163668609 is about 46515.2513590973. The cubic root of 2163668609 is about 1293.3922314302.

The spelling of 2163668609 in words is "two billion, one hundred sixty-three million, six hundred sixty-eight thousand, six hundred nine".