12664093656 has 16 divisors (see below), whose sum is σ = 31660234200. Its totient is φ = 4221364544.

The previous prime is 12664093621. The next prime is 12664093661. The reversal of 12664093656 is 65639046621.

It is a happy number.

It is a congruent number.

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, 263835261 + ... + 263835308.

Almost surely, 2^12664093656 is an apocalyptic number.

It is an amenable number.

12664093656 is an abundant number, since it is smaller than the sum of its proper divisors (18996140544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12664093656 is a wasteful number, since it uses less digits than its factorization.

12664093656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527670578 (or 527670574 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 48.

The spelling of 12664093656 in words is "twelve billion, six hundred sixty-four million, ninety-three thousand, six hundred fifty-six".