181533151472 has 20 divisors (see below), whose sum is σ = 363066303936. Its totient is φ = 87838621440.

The previous prime is 181533151439. The next prime is 181533151489. The reversal of 181533151472 is 274151335181.

181533151472 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

181533151472 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182996633 + ... + 182997624.

Almost surely, 2^181533151472 is an apocalyptic number.

It is an amenable number.

181533151472 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

181533151472 is a wasteful number, since it uses less digits than its factorization.

181533151472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365994296 (or 365994290 counting only the distinct ones).

The product of its digits is 100800, while the sum is 41.

The spelling of 181533151472 in words is "one hundred eighty-one billion, five hundred thirty-three million, one hundred fifty-one thousand, four hundred seventy-two".