12662645136 has 80 divisors (see below), whose sum is σ = 33406105920. Its totient is φ = 4131901440.

The previous prime is 12662645111. The next prime is 12662645153. The reversal of 12662645136 is 63154626621.

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 15 ways as a sum of consecutive naturals, for example, 673236 + ... + 691788.

It is an arithmetic number, because the mean of its divisors is an integer number (417576324).

Almost surely, 2^12662645136 is an apocalyptic number.

12662645136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12662645136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16703052960).

12662645136 is an abundant number, since it is smaller than the sum of its proper divisors (20743460784).

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

12662645136 is a wasteful number, since it uses less digits than its factorization.

12662645136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18864 (or 18858 counting only the distinct ones).

The product of its digits is 311040, while the sum is 42.

The spelling of 12662645136 in words is "twelve billion, six hundred sixty-two million, six hundred forty-five thousand, one hundred thirty-six".