12768989546556 has 36 divisors (see below), whose sum is σ = 33390173817000. Its totient is φ = 4109559853728.

The previous prime is 12768989546549. The next prime is 12768989546557. The reversal of 12768989546556 is 65564598986721.

12768989546556 is a `hidden beast` number, since 1 + 2 + 7 + 6 + 8 + 9 + 8 + 9 + 54 + 6 + 556 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×12768989546556² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12768989546557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6115415406 + ... + 6115417493.

It is an arithmetic number, because the mean of its divisors is an integer number (927504828250).

Almost surely, 2^{12768989546556} is an apocalyptic number.

It is an amenable number.

12768989546556 is an abundant number, since it is smaller than the sum of its proper divisors (20621184270444).

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

12768989546556 is a wasteful number, since it uses less digits than its factorization.

12768989546556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12230832938 (or 12230832933 counting only the distinct ones).

The product of its digits is 7838208000, while the sum is 81.

The spelling of 12768989546556 in words is "twelve trillion, seven hundred sixty-eight billion, nine hundred eighty-nine million, five hundred forty-six thousand, five hundred fifty-six".