16641694273 has 2 divisors, whose sum is σ = 16641694274. Its totient is φ = 16641694272.

The previous prime is 16641694259. The next prime is 16641694313. The reversal of 16641694273 is 37249614661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16081283344 + 560410929 = 126812^2 + 23673^2 .

It is a cyclic number.

It is not a de Polignac number, because 16641694273 - 2²⁵ = 16608139841 is a prime.

It is not a weakly prime, because it can be changed into another prime (16641694073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8320847136 + 8320847137.

It is an arithmetic number, because the mean of its divisors is an integer number (8320847137).

Almost surely, 2^16641694273 is an apocalyptic number.

It is an amenable number.

16641694273 is a deficient number, since it is larger than the sum of its proper divisors (1).

16641694273 is an equidigital number, since it uses as much as digits as its factorization.

16641694273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 49.

The spelling of 16641694273 in words is "sixteen billion, six hundred forty-one million, six hundred ninety-four thousand, two hundred seventy-three".