12641179489 has 9 divisors (see below), whose sum is σ = 13095491097. Its totient is φ = 12202128624.

The previous prime is 12641179487. The next prime is 12641179531. The reversal of 12641179489 is 98497114621.

The square root of 12641179489 is 112433.

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 671069025 + 11970110464 = 25905^2 + 109408^2 .

It is not a de Polignac number, because 12641179489 - 2¹ = 12641179487 is a prime.

It is a super-2 number, since 2×12641179489² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12641179487) 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, 3258619 + ... + 3262495.

Almost surely, 2^12641179489 is an apocalyptic number.

12641179489 is the 112433-rd square number.

12641179489 is the 56217-th centered octagonal number.

It is an amenable number.

12641179489 is a deficient number, since it is larger than the sum of its proper divisors (454311608).

12641179489 is an frugal number, since it uses more digits than its factorization.

12641179489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7812 (or 3906 counting only the distinct ones).

The product of its digits is 870912, while the sum is 52.

The spelling of 12641179489 in words is "twelve billion, six hundred forty-one million, one hundred seventy-nine thousand, four hundred eighty-nine".