12651654564 has 72 divisors (see below), whose sum is σ = 33850078080. Its totient is φ = 3973147200.

The previous prime is 12651654443. The next prime is 12651654593. The reversal of 12651654564 is 46545615621.

12651654564 is a `hidden beast` number, since 1 + 26 + 5 + 1 + 65 + 4 + 564 = 666.

12651654564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 72709 + ... + 174899.

Almost surely, 2^12651654564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12651654564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16925039040).

12651654564 is an abundant number, since it is smaller than the sum of its proper divisors (21198423516).

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

12651654564 is a wasteful number, since it uses less digits than its factorization.

12651654564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102401 (or 102396 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The spelling of 12651654564 in words is "twelve billion, six hundred fifty-one million, six hundred fifty-four thousand, five hundred sixty-four".