2161028034845 has 16 divisors (see below), whose sum is σ = 2678356610352. Its totient is φ = 1672967462400.

The previous prime is 2161028034833. The next prime is 2161028034853. The reversal of 2161028034845 is 5484308201612.

It can be written as a sum of positive squares in 8 ways, for example, as 33904961689 + 2127123073156 = 184133^2 + 1458466^2 .

It is not a de Polignac number, because 2161028034845 - 2²⁰ = 2161026986269 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2161028034796 and 2161028034805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55835606 + ... + 55874295.

It is an arithmetic number, because the mean of its divisors is an integer number (167397288147).

Almost surely, 2^{2161028034845} is an apocalyptic number.

It is an amenable number.

2161028034845 is a deficient number, since it is larger than the sum of its proper divisors (517328575507).

2161028034845 is a wasteful number, since it uses less digits than its factorization.

2161028034845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111710032.

The product of its (nonzero) digits is 368640, while the sum is 44.

The spelling of 2161028034845 in words is "two trillion, one hundred sixty-one billion, twenty-eight million, thirty-four thousand, eight hundred forty-five".