12878321568 has 96 divisors (see below), whose sum is σ = 39881318400. Its totient is φ = 3560820480.

The previous prime is 12878321567. The next prime is 12878321623. The reversal of 12878321568 is 86512387821.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 12878321568.

It is not an unprimeable number, because it can be changed into a prime (12878321563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288268 + ... + 329931.

It is an arithmetic number, because the mean of its divisors is an integer number (415430400).

Almost surely, 2^12878321568 is an apocalyptic number.

It is an amenable number.

12878321568 is an abundant number, since it is smaller than the sum of its proper divisors (27002996832).

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

12878321568 is a wasteful number, since it uses less digits than its factorization.

12878321568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618250 (or 618242 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 51.

The spelling of 12878321568 in words is "twelve billion, eight hundred seventy-eight million, three hundred twenty-one thousand, five hundred sixty-eight".