12987718056 has 48 divisors (see below), whose sum is σ = 35180308800. Its totient is φ = 4328594592.

The previous prime is 12987718049. The next prime is 12987718087. The reversal of 12987718056 is 65081778921.

It is a junction number, because it is equal to n+sod(n) for n = 12987717993 and 12987718011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 942625 + ... + 956303.

It is an arithmetic number, because the mean of its divisors is an integer number (732923100).

Almost surely, 2^12987718056 is an apocalyptic number.

It is an amenable number.

12987718056 is an abundant number, since it is smaller than the sum of its proper divisors (22192590744).

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

12987718056 is a wasteful number, since it uses less digits than its factorization.

12987718056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26878 (or 26871 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 54.

The spelling of 12987718056 in words is "twelve billion, nine hundred eighty-seven million, seven hundred eighteen thousand, fifty-six".