12878877890 has 8 divisors (see below), whose sum is σ = 23181980220. Its totient is φ = 5151551152.

The previous prime is 12878877859. The next prime is 12878877917. The reversal of 12878877890 is 9877887821.

12878877890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12771486121 + 107391769 = 113011^2 + 10363^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 643943885 + ... + 643943904.

Almost surely, 2^12878877890 is an apocalyptic number.

12878877890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12878877890 is a deficient number, since it is larger than the sum of its proper divisors (10303102330).

12878877890 is a wasteful number, since it uses less digits than its factorization.

12878877890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287887796.

The product of its (nonzero) digits is 25288704, while the sum is 65.

The spelling of 12878877890 in words is "twelve billion, eight hundred seventy-eight million, eight hundred seventy-seven thousand, eight hundred ninety".