163939055941 has 4 divisors (see below), whose sum is σ = 164103489292. Its totient is φ = 163774622592.

The previous prime is 163939055939. The next prime is 163939055947. The reversal of 163939055941 is 149550939361.

It is a happy number.

163939055941 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 149550939361 = 53 ⋅2821715837.

It can be written as a sum of positive squares in 2 ways, for example, as 68720525316 + 95218530625 = 262146^2 + 308575^2 .

It is a cyclic number.

It is not a de Polignac number, because 163939055941 - 2¹ = 163939055939 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163939055947) 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 in 3 ways as a sum of consecutive naturals, for example, 82215180 + ... + 82217173.

It is an arithmetic number, because the mean of its divisors is an integer number (41025872323).

Almost surely, 2^163939055941 is an apocalyptic number.

It is an amenable number.

163939055941 is a deficient number, since it is larger than the sum of its proper divisors (164433351).

163939055941 is an equidigital number, since it uses as much as digits as its factorization.

163939055941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164433350.

The product of its (nonzero) digits is 3936600, while the sum is 55.

The spelling of 163939055941 in words is "one hundred sixty-three billion, nine hundred thirty-nine million, fifty-five thousand, nine hundred forty-one".