12641104665 has 24 divisors (see below), whose sum is σ = 25041427008. Its totient is φ = 5778790560.

The previous prime is 12641104573. The next prime is 12641104667. The reversal of 12641104665 is 56640114621.

12641104665 is a `hidden beast` number, since 1 + 2 + 641 + 1 + 0 + 4 + 6 + 6 + 5 = 666.

It is not a de Polignac number, because 12641104665 - 2¹⁷ = 12640973593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12641104667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20064931 + ... + 20065560.

It is an arithmetic number, because the mean of its divisors is an integer number (1043392792).

Almost surely, 2^12641104665 is an apocalyptic number.

12641104665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12641104665 is a deficient number, since it is larger than the sum of its proper divisors (12400322343).

12641104665 is a wasteful number, since it uses less digits than its factorization.

12641104665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40130509 (or 40130506 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 12641104665 in words is "twelve billion, six hundred forty-one million, one hundred four thousand, six hundred sixty-five".