2163764191 has 2 divisors, whose sum is σ = 2163764192. Its totient is φ = 2163764190.

The previous prime is 2163764189. The next prime is 2163764203. The reversal of 2163764191 is 1914673612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2163764191 - 2¹ = 2163764189 is a prime.

Together with 2163764189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2163734191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1081882095 + 1081882096.

It is an arithmetic number, because the mean of its divisors is an integer number (1081882096).

Almost surely, 2^2163764191 is an apocalyptic number.

2163764191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2163764191 is an equidigital number, since it uses as much as digits as its factorization.

2163764191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 2163764191 is about 46516.2787742098. The cubic root of 2163764191 is about 1293.4112767368.

The spelling of 2163764191 in words is "two billion, one hundred sixty-three million, seven hundred sixty-four thousand, one hundred ninety-one".