12643054544 has 40 divisors (see below), whose sum is σ = 25437220872. Its totient is φ = 6082836480.

The previous prime is 12643054531. The next prime is 12643054559. The reversal of 12643054544 is 44545034621.

It can be written as a sum of positive squares in 4 ways, for example, as 408040000 + 12235014544 = 20200^2 + 110612^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12643054498 and 12643054507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84119 + ... + 179894.

Almost surely, 2^12643054544 is an apocalyptic number.

It is an amenable number.

12643054544 is an abundant number, since it is smaller than the sum of its proper divisors (12794166328).

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

12643054544 is a wasteful number, since it uses less digits than its factorization.

12643054544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264135 (or 264129 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 38.

The spelling of 12643054544 in words is "twelve billion, six hundred forty-three million, fifty-four thousand, five hundred forty-four".