18671153346169 has 9 divisors (see below), whose sum is σ = 18775665290829. Its totient is φ = 18567220020480.

The previous prime is 18671153346127. The next prime is 18671153346193. The reversal of 18671153346169 is 96164335117681.

It is a happy number.

The square root of 18671153346169 is 4321013.

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

It can be written as a sum of positive squares in 4 ways, for example, as 14930843762025 + 3740309584144 = 3864045^2 + 1933988^2 .

It is not a de Polignac number, because 18671153346169 - 2⁴¹ = 16472130090617 is a prime.

It is a super-2 number, since 2×18671153346169² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18671153346569) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 782091417 + ... + 782115289.

Almost surely, 2^{18671153346169} is an apocalyptic number.

18671153346169 is the 4321013-rd square number.

18671153346169 is the 2160507-th centered octagonal number.

It is an amenable number.

18671153346169 is a deficient number, since it is larger than the sum of its proper divisors (104511944660).

18671153346169 is an frugal number, since it uses more digits than its factorization.

18671153346169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48108 (or 24054 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 61.

The spelling of 18671153346169 in words is "eighteen trillion, six hundred seventy-one billion, one hundred fifty-three million, three hundred forty-six thousand, one hundred sixty-nine".