12681967788 has 72 divisors (see below), whose sum is σ = 36796949280. Its totient is φ = 3607580160.

The previous prime is 12681967777. The next prime is 12681967801. The reversal of 12681967788 is 88776918621.

It is a super-2 number, since 2×12681967788² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52173 + ... + 167588.

It is an arithmetic number, because the mean of its divisors is an integer number (511068740).

Almost surely, 2^12681967788 is an apocalyptic number.

12681967788 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12681967788 is an abundant number, since it is smaller than the sum of its proper divisors (24114981492).

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

12681967788 is a wasteful number, since it uses less digits than its factorization.

12681967788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220007 (or 220002 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 63.

The spelling of 12681967788 in words is "twelve billion, six hundred eighty-one million, nine hundred sixty-seven thousand, seven hundred eighty-eight".