181939459956 has 24 divisors (see below), whose sum is σ = 426897061920. Its totient is φ = 60307678752.

The previous prime is 181939459921. The next prime is 181939459979. The reversal of 181939459956 is 659954939181.

181939459956 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42348751 + ... + 42353046.

It is an arithmetic number, because the mean of its divisors is an integer number (17787377580).

Almost surely, 2^181939459956 is an apocalyptic number.

It is an amenable number.

181939459956 is an abundant number, since it is smaller than the sum of its proper divisors (244957601964).

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

181939459956 is a wasteful number, since it uses less digits than its factorization.

181939459956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84701983 (or 84701981 counting only the distinct ones).

The product of its digits is 94478400, while the sum is 69.

The spelling of 181939459956 in words is "one hundred eighty-one billion, nine hundred thirty-nine million, four hundred fifty-nine thousand, nine hundred fifty-six".