2161080149 has 2 divisors, whose sum is σ = 2161080150. Its totient is φ = 2161080148.

The previous prime is 2161080079. The next prime is 2161080157. The reversal of 2161080149 is 9410801612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1707177124 + 453903025 = 41318^2 + 21305^2 .

It is a cyclic number.

It is not a de Polignac number, because 2161080149 - 2²⁴ = 2144302933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161080199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080540074 + 1080540075.

It is an arithmetic number, because the mean of its divisors is an integer number (1080540075).

Almost surely, 2^2161080149 is an apocalyptic number.

It is an amenable number.

2161080149 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161080149 is an equidigital number, since it uses as much as digits as its factorization.

2161080149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 2161080149 is about 46487.4192551060. The cubic root of 2161080149 is about 1292.8762513042.

The spelling of 2161080149 in words is "two billion, one hundred sixty-one million, eighty thousand, one hundred forty-nine".