12689565168 has 40 divisors (see below), whose sum is σ = 37464431488. Its totient is φ = 3625589952.

The previous prime is 12689565167. The next prime is 12689565173. The reversal of 12689565168 is 86156598621.

It is a super-2 number, since 2×12689565168² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12689565167) 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, 18882946 + ... + 18883617.

Almost surely, 2^12689565168 is an apocalyptic number.

It is an amenable number.

12689565168 is an abundant number, since it is smaller than the sum of its proper divisors (24774866320).

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

12689565168 is a wasteful number, since it uses less digits than its factorization.

12689565168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37766581 (or 37766575 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 57.

The spelling of 12689565168 in words is "twelve billion, six hundred eighty-nine million, five hundred sixty-five thousand, one hundred sixty-eight".