2169996641 has 2 divisors, whose sum is σ = 2169996642. Its totient is φ = 2169996640.

The previous prime is 2169996629. The next prime is 2169996691. The reversal of 2169996641 is 1466999612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2143690000 + 26306641 = 46300^2 + 5129^2 .

It is a cyclic number.

It is not a de Polignac number, because 2169996641 - 2¹⁴ = 2169980257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2169996691) 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 as a sum of consecutive naturals, namely, 1084998320 + 1084998321.

It is an arithmetic number, because the mean of its divisors is an integer number (1084998321).

Almost surely, 2^2169996641 is an apocalyptic number.

It is an amenable number.

2169996641 is a deficient number, since it is larger than the sum of its proper divisors (1).

2169996641 is an equidigital number, since it uses as much as digits as its factorization.

2169996641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1259712, while the sum is 53.

The square root of 2169996641 is about 46583.2227416696. Note that the first 3 decimals coincide. The cubic root of 2169996641 is about 1294.6519223711.

The spelling of 2169996641 in words is "two billion, one hundred sixty-nine million, nine hundred ninety-six thousand, six hundred forty-one".