208163974841 has 2 divisors, whose sum is σ = 208163974842. Its totient is φ = 208163974840.

The previous prime is 208163974793. The next prime is 208163974897. The reversal of 208163974841 is 148479361802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200685184441 + 7478790400 = 447979^2 + 86480^2 .

It is a cyclic number.

It is not a de Polignac number, because 208163974841 - 2¹⁸ = 208163712697 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (208163970841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104081987420 + 104081987421.

It is an arithmetic number, because the mean of its divisors is an integer number (104081987421).

Almost surely, 2^208163974841 is an apocalyptic number.

It is an amenable number.

208163974841 is a deficient number, since it is larger than the sum of its proper divisors (1).

208163974841 is an equidigital number, since it uses as much as digits as its factorization.

208163974841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 208163974841 in words is "two hundred eight billion, one hundred sixty-three million, nine hundred seventy-four thousand, eight hundred forty-one".