12919728009 has 8 divisors (see below), whose sum is σ = 17551328832. Its totient is φ = 8450639600.

The previous prime is 12919727981. The next prime is 12919728011. The reversal of 12919728009 is 90082791921.

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

It is a cyclic number.

It is not a de Polignac number, because 12919728009 - 2¹¹ = 12919725961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12919728089) 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, 40627917 + ... + 40628234.

It is an arithmetic number, because the mean of its divisors is an integer number (2193916104).

Almost surely, 2^12919728009 is an apocalyptic number.

It is an amenable number.

12919728009 is a deficient number, since it is larger than the sum of its proper divisors (4631600823).

12919728009 is an equidigital number, since it uses as much as digits as its factorization.

12919728009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81256207.

The product of its (nonzero) digits is 163296, while the sum is 48.

The spelling of 12919728009 in words is "twelve billion, nine hundred nineteen million, seven hundred twenty-eight thousand, nine".