12681368961 has 8 divisors (see below), whose sum is σ = 17072652480. Its totient is φ = 8372165712.

The previous prime is 12681368957. The next prime is 12681368993. The reversal of 12681368961 is 16986318621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12681368961 - 2² = 12681368957 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12681368261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20519706 + ... + 20520323.

It is an arithmetic number, because the mean of its divisors is an integer number (2134081560).

Almost surely, 2^12681368961 is an apocalyptic number.

It is an amenable number.

12681368961 is a deficient number, since it is larger than the sum of its proper divisors (4391283519).

12681368961 is a wasteful number, since it uses less digits than its factorization.

12681368961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41040135.

The product of its digits is 746496, while the sum is 51.

The spelling of 12681368961 in words is "twelve billion, six hundred eighty-one million, three hundred sixty-eight thousand, nine hundred sixty-one".