161138060838 has 24 divisors (see below), whose sum is σ = 349396810776. Its totient is φ = 53672018400.

The previous prime is 161138060753. The next prime is 161138060861. The reversal of 161138060838 is 838060831161.

161138060838 is a `hidden beast` number, since 1 + 6 + 1 + 1 + 3 + 8 + 0 + 608 + 38 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 161138060793 and 161138060802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3364608 + ... + 3412163.

It is an arithmetic number, because the mean of its divisors is an integer number (14558200449).

Almost surely, 2^161138060838 is an apocalyptic number.

161138060838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

161138060838 is an abundant number, since it is smaller than the sum of its proper divisors (188258749938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161138060838 is a wasteful number, since it uses less digits than its factorization.

161138060838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6778100 (or 6778097 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

Adding to 161138060838 its reverse (838060831161), we get a palindrome (999198891999).

The spelling of 161138060838 in words is "one hundred sixty-one billion, one hundred thirty-eight million, sixty thousand, eight hundred thirty-eight".