12656708720 has 40 divisors (see below), whose sum is σ = 29489947344. Its totient is φ = 5051827712.

The previous prime is 12656708717. The next prime is 12656708741. The reversal of 12656708720 is 2780765621.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132029 + ... + 206748.

Almost surely, 2^12656708720 is an apocalyptic number.

12656708720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12656708720 is an abundant number, since it is smaller than the sum of its proper divisors (16833238624).

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

12656708720 is a wasteful number, since it uses less digits than its factorization.

12656708720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339257 (or 339251 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 44.

The spelling of 12656708720 in words is "twelve billion, six hundred fifty-six million, seven hundred eight thousand, seven hundred twenty".