12681368956 has 6 divisors (see below), whose sum is σ = 22192395680. Its totient is φ = 6340684476.

The previous prime is 12681368939. The next prime is 12681368957. The reversal of 12681368956 is 65986318621.

It is a junction number, because it is equal to n+sod(n) for n = 12681368897 and 12681368906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12681368957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1585171116 + ... + 1585171123.

Almost surely, 2^12681368956 is an apocalyptic number.

It is an amenable number.

12681368956 is a deficient number, since it is larger than the sum of its proper divisors (9511026724).

12681368956 is a wasteful number, since it uses less digits than its factorization.

12681368956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3170342243 (or 3170342241 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 55.

The spelling of 12681368956 in words is "twelve billion, six hundred eighty-one million, three hundred sixty-eight thousand, nine hundred fifty-six".