181193803940 has 48 divisors (see below), whose sum is σ = 382950457344. Its totient is φ = 72012816000.

The previous prime is 181193803873. The next prime is 181193803991. The reversal of 181193803940 is 49308391181.

181193803940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 4144877 + ... + 4188363.

It is an arithmetic number, because the mean of its divisors is an integer number (7978134528).

Almost surely, 2^181193803940 is an apocalyptic number.

181193803940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181193803940 is an abundant number, since it is smaller than the sum of its proper divisors (201756653404).

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

181193803940 is a wasteful number, since it uses less digits than its factorization.

181193803940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44828 (or 44826 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 47.

The spelling of 181193803940 in words is "one hundred eighty-one billion, one hundred ninety-three million, eight hundred three thousand, nine hundred forty".