2149611811 has 2 divisors, whose sum is σ = 2149611812. Its totient is φ = 2149611810.

The previous prime is 2149611803. The next prime is 2149611857. The reversal of 2149611811 is 1181169412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2149611811 - 2³ = 2149611803 is a prime.

It is not a weakly prime, because it can be changed into another prime (2149611511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1074805905 + 1074805906.

It is an arithmetic number, because the mean of its divisors is an integer number (1074805906).

Almost surely, 2^2149611811 is an apocalyptic number.

2149611811 is a deficient number, since it is larger than the sum of its proper divisors (1).

2149611811 is an equidigital number, since it uses as much as digits as its factorization.

2149611811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 34.

The square root of 2149611811 is about 46363.9063388753. The cubic root of 2149611811 is about 1290.5851983035.

The spelling of 2149611811 in words is "two billion, one hundred forty-nine million, six hundred eleven thousand, eight hundred eleven".