12878750205 has 36 divisors (see below), whose sum is σ = 23066575740. Its totient is φ = 6647074560.

The previous prime is 12878750179. The next prime is 12878750243. The reversal of 12878750205 is 50205787821.

It can be written as a sum of positive squares in 2 ways, for example, as 9754722756 + 3124027449 = 98766^2 + 55893^2 .

It is not a de Polignac number, because 12878750205 - 2¹⁰ = 12878749181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 105660 + ... + 192149.

It is an arithmetic number, because the mean of its divisors is an integer number (640738215).

Almost surely, 2^12878750205 is an apocalyptic number.

12878750205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12878750205 is a deficient number, since it is larger than the sum of its proper divisors (10187825535).

12878750205 is a wasteful number, since it uses less digits than its factorization.

12878750205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297882 (or 297848 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 45.

The spelling of 12878750205 in words is "twelve billion, eight hundred seventy-eight million, seven hundred fifty thousand, two hundred five".