12809319915 has 32 divisors (see below), whose sum is σ = 23434891776. Its totient is φ = 5852655360.

The previous prime is 12809319907. The next prime is 12809319931. The reversal of 12809319915 is 51991390821.

It is not a de Polignac number, because 12809319915 - 2³ = 12809319907 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 178660 + ... + 239870.

It is an arithmetic number, because the mean of its divisors is an integer number (732340368).

Almost surely, 2^12809319915 is an apocalyptic number.

12809319915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12809319915 is a deficient number, since it is larger than the sum of its proper divisors (10625571861).

12809319915 is a wasteful number, since it uses less digits than its factorization.

12809319915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63219.

The product of its (nonzero) digits is 174960, while the sum is 48.

The spelling of 12809319915 in words is "twelve billion, eight hundred nine million, three hundred nineteen thousand, nine hundred fifteen".