161838732933 has 24 divisors (see below), whose sum is σ = 240205114968. Its totient is φ = 104923994112.

The previous prime is 161838732901. The next prime is 161838732949. The reversal of 161838732933 is 339237838161.

161838732933 is a `hidden beast` number, since 161 + 83 + 87 + 329 + 3 + 3 = 666.

161838732933 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 127976476644 + 33862256289 = 357738^2 + 184017^2 .

It is not a de Polignac number, because 161838732933 - 2⁵ = 161838732901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161838732933.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161838731933) 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 23 ways as a sum of consecutive naturals, for example, 551185 + ... + 792137.

It is an arithmetic number, because the mean of its divisors is an integer number (10008546457).

Almost surely, 2^161838732933 is an apocalyptic number.

It is an amenable number.

161838732933 is a deficient number, since it is larger than the sum of its proper divisors (78366382035).

161838732933 is a wasteful number, since it uses less digits than its factorization.

161838732933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243013 (or 243010 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The spelling of 161838732933 in words is "one hundred sixty-one billion, eight hundred thirty-eight million, seven hundred thirty-two thousand, nine hundred thirty-three".