12641648 has 20 divisors (see below), whose sum is σ = 24605568. Its totient is φ = 6291840.

The previous prime is 12641641. The next prime is 12641663. The reversal of 12641648 is 84614621.

It is a super-2 number, since 2×12641648² = 319622528311808, which contains 22 as substring.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12641641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2033 + ... + 5423.

Almost surely, 2^12641648 is an apocalyptic number.

It is an amenable number.

12641648 is a deficient number, since it is larger than the sum of its proper divisors (11963920).

12641648 is a wasteful number, since it uses less digits than its factorization.

12641648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3632 (or 3626 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The square root of 12641648 is about 3555.5095274799. The cubic root of 12641648 is about 232.9527801306.

The spelling of 12641648 in words is "twelve million, six hundred forty-one thousand, six hundred forty-eight".