2168001811 has 2 divisors, whose sum is σ = 2168001812. Its totient is φ = 2168001810.

The previous prime is 2168001809. The next prime is 2168001877. The reversal of 2168001811 is 1181008612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2168001811 - 2¹ = 2168001809 is a prime.

It is a super-3 number, since 3×2168001811³ (a number of 29 digits) contains 333 as substring.

Together with 2168001809, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2168001811.

It is not a weakly prime, because it can be changed into another prime (2168001881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084000905 + 1084000906.

It is an arithmetic number, because the mean of its divisors is an integer number (1084000906).

Almost surely, 2^2168001811 is an apocalyptic number.

2168001811 is a deficient number, since it is larger than the sum of its proper divisors (1).

2168001811 is an equidigital number, since it uses as much as digits as its factorization.

2168001811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 28.

The square root of 2168001811 is about 46561.8063545649. The cubic root of 2168001811 is about 1294.2550857695.

The spelling of 2168001811 in words is "two billion, one hundred sixty-eight million, one thousand, eight hundred eleven".