181380441903 has 8 divisors (see below), whose sum is σ = 256066506288. Its totient is φ = 113807336064.

The previous prime is 181380441889. The next prime is 181380441929. The reversal of 181380441903 is 309144083181.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 181380441903 - 2⁵ = 181380441871 is a prime.

It is a super-2 number, since 2×181380441903² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181380441943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1778239576 + ... + 1778239677.

It is an arithmetic number, because the mean of its divisors is an integer number (32008313286).

Almost surely, 2^181380441903 is an apocalyptic number.

181380441903 is a deficient number, since it is larger than the sum of its proper divisors (74686064385).

181380441903 is a wasteful number, since it uses less digits than its factorization.

181380441903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3556479273.

The product of its (nonzero) digits is 82944, while the sum is 42.

The spelling of 181380441903 in words is "one hundred eighty-one billion, three hundred eighty million, four hundred forty-one thousand, nine hundred three".