12856621796 has 24 divisors (see below), whose sum is σ = 23000302080. Its totient is φ = 6286248800.

The previous prime is 12856621793. The next prime is 12856621849. The reversal of 12856621796 is 69712665821.

It is not an unprimeable number, because it can be changed into a prime (12856621793) 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, 97535 + ... + 187686.

It is an arithmetic number, because the mean of its divisors is an integer number (958345920).

Almost surely, 2^12856621796 is an apocalyptic number.

It is an amenable number.

12856621796 is a deficient number, since it is larger than the sum of its proper divisors (10143680284).

12856621796 is a wasteful number, since it uses less digits than its factorization.

12856621796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285475 (or 285473 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 53.

The spelling of 12856621796 in words is "twelve billion, eight hundred fifty-six million, six hundred twenty-one thousand, seven hundred ninety-six".