838146908161 has 2 divisors, whose sum is σ = 838146908162. Its totient is φ = 838146908160.

The previous prime is 838146908153. The next prime is 838146908177. The reversal of 838146908161 is 161809641838.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 620855747136 + 217291161025 = 787944^2 + 466145^2 .

It is a cyclic number.

It is not a de Polignac number, because 838146908161 - 2³ = 838146908153 is a prime.

It is not a weakly prime, because it can be changed into another prime (838146908111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419073454080 + 419073454081.

It is an arithmetic number, because the mean of its divisors is an integer number (419073454081).

Almost surely, 2^838146908161 is an apocalyptic number.

It is an amenable number.

838146908161 is a deficient number, since it is larger than the sum of its proper divisors (1).

838146908161 is an equidigital number, since it uses as much as digits as its factorization.

838146908161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1990656, while the sum is 55.

The spelling of 838146908161 in words is "eight hundred thirty-eight billion, one hundred forty-six million, nine hundred eight thousand, one hundred sixty-one".