181484144440 has 32 divisors (see below), whose sum is σ = 421511564160. Its totient is φ = 70251926400.

The previous prime is 181484144423. The next prime is 181484144617. The reversal of 181484144440 is 44441484181.

It is a super-4 number, since 4×181484144440⁴ (a number of 46 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73177851 + ... + 73180330.

It is an arithmetic number, because the mean of its divisors is an integer number (13172236380).

Almost surely, 2^181484144440 is an apocalyptic number.

181484144440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181484144440 is an abundant number, since it is smaller than the sum of its proper divisors (240027419720).

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

181484144440 is a wasteful number, since it uses less digits than its factorization.

181484144440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146358223 (or 146358219 counting only the distinct ones).

The product of its (nonzero) digits is 262144, while the sum is 43.

The spelling of 181484144440 in words is "one hundred eighty-one billion, four hundred eighty-four million, one hundred forty-four thousand, four hundred forty".