181847865472 has 512 divisors, whose sum is σ = 491803200000. Its totient is φ = 66328657920.

The previous prime is 181847865389. The next prime is 181847865503. The reversal of 181847865472 is 274568748181.

It is a self number, because there is not a number n which added to its sum of digits gives 181847865472.

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 63 ways as a sum of consecutive naturals, for example, 444615604 + ... + 444616012.

It is an arithmetic number, because the mean of its divisors is an integer number (960553125).

Almost surely, 2^181847865472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181847865472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245901600000).

181847865472 is an abundant number, since it is smaller than the sum of its proper divisors (309955334528).

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

181847865472 is a wasteful number, since it uses less digits than its factorization.

181847865472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517 (or 491 counting only the distinct ones).

The product of its digits is 24084480, while the sum is 61.

The spelling of 181847865472 in words is "one hundred eighty-one billion, eight hundred forty-seven million, eight hundred sixty-five thousand, four hundred seventy-two".