12669589648 has 20 divisors (see below), whose sum is σ = 24588192748. Its totient is φ = 6324249600.

The previous prime is 12669589637. The next prime is 12669589661. The reversal of 12669589648 is 84698596621.

It can be written as a sum of positive squares in 2 ways, for example, as 5418726544 + 7250863104 = 73612^2 + 85152^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12669589648.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649161 + ... + 668392.

Almost surely, 2^12669589648 is an apocalyptic number.

It is an amenable number.

12669589648 is a deficient number, since it is larger than the sum of its proper divisors (11918603100).

12669589648 is a wasteful number, since it uses less digits than its factorization.

12669589648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318162 (or 1318156 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 64.

The spelling of 12669589648 in words is "twelve billion, six hundred sixty-nine million, five hundred eighty-nine thousand, six hundred forty-eight".