12651682644 has 36 divisors (see below), whose sum is σ = 31990192416. Its totient is φ = 4215968208.

The previous prime is 12651682643. The next prime is 12651682649. The reversal of 12651682644 is 44628615621.

It is a happy number.

12651682644 is a `hidden beast` number, since 12 + 6 + 516 + 82 + 6 + 44 = 666.

12651682644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 12651682644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12651682643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73927 + ... + 175409.

It is an arithmetic number, because the mean of its divisors is an integer number (888616456).

Almost surely, 2^12651682644 is an apocalyptic number.

It is an amenable number.

12651682644 is an abundant number, since it is smaller than the sum of its proper divisors (19338509772).

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

12651682644 is a wasteful number, since it uses less digits than its factorization.

12651682644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104956 (or 104951 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The spelling of 12651682644 in words is "twelve billion, six hundred fifty-one million, six hundred eighty-two thousand, six hundred forty-four".