181340363178 has 48 divisors (see below), whose sum is σ = 423195403176. Its totient is φ = 55788082560.

The previous prime is 181340363147. The next prime is 181340363201. The reversal of 181340363178 is 871363043181.

181340363178 is a `hidden beast` number, since 1 + 8 + 1 + 3 + 4 + 0 + 3 + 631 + 7 + 8 = 666.

181340363178 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 39861320409 + 141479042769 = 199653^2 + 376137^2 .

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1481076 + ... + 1598832.

Almost surely, 2^181340363178 is an apocalyptic number.

181340363178 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

181340363178 is an abundant number, since it is smaller than the sum of its proper divisors (241855039998).

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

181340363178 is a wasteful number, since it uses less digits than its factorization.

181340363178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124359 (or 124356 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 181340363178 in words is "one hundred eighty-one billion, three hundred forty million, three hundred sixty-three thousand, one hundred seventy-eight".