12868351856 has 20 divisors (see below), whose sum is σ = 25029453072. Its totient is φ = 6409138176.

The previous prime is 12868351849. The next prime is 12868351879. The reversal of 12868351856 is 65815386821.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12868351798 and 12868351807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1560620 + ... + 1568843.

Almost surely, 2^12868351856 is an apocalyptic number.

12868351856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12868351856 is a deficient number, since it is larger than the sum of its proper divisors (12161101216).

12868351856 is a wasteful number, since it uses less digits than its factorization.

12868351856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3129728 (or 3129722 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 53.

The spelling of 12868351856 in words is "twelve billion, eight hundred sixty-eight million, three hundred fifty-one thousand, eight hundred fifty-six".