181946378412 has 48 divisors (see below), whose sum is σ = 475313731200. Its totient is φ = 60185820240.

The previous prime is 181946378359. The next prime is 181946378443. The reversal of 181946378412 is 214873649181.

181946378412 is a `hidden beast` number, since 1 + 8 + 194 + 6 + 37 + 8 + 412 = 666.

181946378412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 15 ways as a sum of consecutive naturals, for example, 6415962 + ... + 6444257.

It is an arithmetic number, because the mean of its divisors is an integer number (9902369400).

Almost surely, 2^181946378412 is an apocalyptic number.

181946378412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

181946378412 is an abundant number, since it is smaller than the sum of its proper divisors (293367352788).

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

181946378412 is a wasteful number, since it uses less digits than its factorization.

181946378412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12860363 (or 12860355 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The spelling of 181946378412 in words is "one hundred eighty-one billion, nine hundred forty-six million, three hundred seventy-eight thousand, four hundred twelve".