12618572421169 has 27 divisors (see below), whose sum is σ = 15019599893697. Its totient is φ = 10588585550400.

The previous prime is 12618572421157. The next prime is 12618572421179. The reversal of 12618572421169 is 96112427581621.

The square root of 12618572421169 is 3552263.

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 7927068405025 + 4691504016144 = 2815505^2 + 2165988^2 .

It is not a de Polignac number, because 12618572421169 - 2⁵ = 12618572421137 is a prime.

It is a super-2 number, since 2×12618572421169² (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 (12618572421149) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 507961189 + ... + 507986029.

Almost surely, 2^{12618572421169} is an apocalyptic number.

12618572421169 is the 3552263-rd square number.

12618572421169 is the 1776132-nd centered octagonal number.

It is an amenable number.

12618572421169 is a deficient number, since it is larger than the sum of its proper divisors (2401027472528).

12618572421169 is an frugal number, since it uses more digits than its factorization.

12618572421169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49730 (or 24865 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 55.

The spelling of 12618572421169 in words is "twelve trillion, six hundred eighteen billion, five hundred seventy-two million, four hundred twenty-one thousand, one hundred sixty-nine".