181161807246 has 96 divisors (see below), whose sum is σ = 466443214848. Its totient is φ = 49725048960.

The previous prime is 181161807241. The next prime is 181161807301. The reversal of 181161807246 is 642708161181.

181161807246 is a `hidden beast` number, since 1 + 8 + 1 + 1 + 618 + 0 + 7 + 24 + 6 = 666.

181161807246 is digitally balanced in base 2, base 3 and base 7, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181161807241) 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 47 ways as a sum of consecutive naturals, for example, 365851 + ... + 704393.

It is an arithmetic number, because the mean of its divisors is an integer number (4858783488).

Almost surely, 2^181161807246 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181161807246, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233221607424).

181161807246 is an abundant number, since it is smaller than the sum of its proper divisors (285281407602).

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

181161807246 is a wasteful number, since it uses less digits than its factorization.

181161807246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338726 (or 338723 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The spelling of 181161807246 in words is "one hundred eighty-one billion, one hundred sixty-one million, eight hundred seven thousand, two hundred forty-six".