12856128768 has 108 divisors (see below), whose sum is σ = 42362783008. Its totient is φ = 3673175040.

The previous prime is 12856128667. The next prime is 12856128799. The reversal of 12856128768 is 86782165821.

12856128768 is a `hidden beast` number, since 1 + 2 + 8 + 561 + 2 + 8 + 76 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 382438 + ... + 414693.

Almost surely, 2^12856128768 is an apocalyptic number.

12856128768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12856128768 is an abundant number, since it is smaller than the sum of its proper divisors (29506654240).

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

12856128768 is an equidigital number, since it uses as much as digits as its factorization.

12856128768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797160 (or 797143 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 54.

The spelling of 12856128768 in words is "twelve billion, eight hundred fifty-six million, one hundred twenty-eight thousand, seven hundred sixty-eight".