2161016168 has 8 divisors (see below), whose sum is σ = 4051905330. Its totient is φ = 1080508080.

The previous prime is 2161016161. The next prime is 2161016173. The reversal of 2161016168 is 8616101612.

It can be written as a sum of positive squares in only one way, i.e., 1534915684 + 626100484 = 39178^2 + 25022^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (2161016161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135063503 + ... + 135063518.

Almost surely, 2^2161016168 is an apocalyptic number.

It is an amenable number.

2161016168 is a deficient number, since it is larger than the sum of its proper divisors (1890889162).

2161016168 is a wasteful number, since it uses less digits than its factorization.

2161016168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270127027 (or 270127023 counting only the distinct ones).

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

The square root of 2161016168 is about 46486.7310960881. The cubic root of 2161016168 is about 1292.8634922013.

The spelling of 2161016168 in words is "two billion, one hundred sixty-one million, sixteen thousand, one hundred sixty-eight".