12878587644 has 24 divisors (see below), whose sum is σ = 32361579600. Its totient is φ = 3962642304.

The previous prime is 12878587621. The next prime is 12878587649. The reversal of 12878587644 is 44678587821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12878587649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41277369 + ... + 41277680.

It is an arithmetic number, because the mean of its divisors is an integer number (1348399150).

Almost surely, 2^12878587644 is an apocalyptic number.

It is an amenable number.

12878587644 is an abundant number, since it is smaller than the sum of its proper divisors (19482991956).

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

12878587644 is a wasteful number, since it uses less digits than its factorization.

12878587644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82555069 (or 82555067 counting only the distinct ones).

The product of its digits is 24084480, while the sum is 60.

The spelling of 12878587644 in words is "twelve billion, eight hundred seventy-eight million, five hundred eighty-seven thousand, six hundred forty-four".