18481289226169 has 81 divisors (see below), whose sum is σ = 24431176341999. Its totient is φ = 13928717880000.

The previous prime is 18481289226167. The next prime is 18481289226227. The reversal of 18481289226169 is 96162298218481.

The square root of 18481289226169 is 4298987.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2399906000569 + 16081383225600 = 1549163^2 + 4010160^2 .

It is not a de Polignac number, because 18481289226169 - 2¹ = 18481289226167 is a prime.

It is a super-2 number, since 2×18481289226169² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18481289226167) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 10261681069 + ... + 10261682869.

Almost surely, 2^{18481289226169} is an apocalyptic number.

18481289226169 is the 4298987-th square number.

18481289226169 is the 2149494-th centered octagonal number.

It is an amenable number.

18481289226169 is a deficient number, since it is larger than the sum of its proper divisors (5949887115830).

18481289226169 is an frugal number, since it uses more digits than its factorization.

18481289226169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3700 (or 1850 counting only the distinct ones).

The product of its digits is 47775744, while the sum is 67.

The spelling of 18481289226169 in words is "eighteen trillion, four hundred eighty-one billion, two hundred eighty-nine million, two hundred twenty-six thousand, one hundred sixty-nine".