18144466444181 has 32 divisors (see below), whose sum is σ = 22941164113920. Its totient is φ = 13938878217600.

The previous prime is 18144466444127. The next prime is 18144466444189.

18144466444181 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 18144466444181 - 2¹⁰ = 18144466443157 is a prime.

It is a super-2 number, since 2×18144466444181² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18144466444189) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 201791225 + ... + 201881121.

It is an arithmetic number, because the mean of its divisors is an integer number (716911378560).

Almost surely, 2^{18144466444181} is an apocalyptic number.

18144466444181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18144466444181 is a deficient number, since it is larger than the sum of its proper divisors (4796697669739).

18144466444181 is a wasteful number, since it uses less digits than its factorization.

18144466444181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126905.

The product of its digits is 9437184, while the sum is 56.

The spelling of 18144466444181 in words is "eighteen trillion, one hundred forty-four billion, four hundred sixty-six million, four hundred forty-four thousand, one hundred eighty-one".