12729147785 has 8 divisors (see below), whose sum is σ = 15277584960. Its totient is φ = 10181579824.

The previous prime is 12729147763. The next prime is 12729147791. The reversal of 12729147785 is 58774192721.

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 12729147785 - 2⁶ = 12729147721 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184637 + ... + 244026.

It is an arithmetic number, because the mean of its divisors is an integer number (1909698120).

Almost surely, 2^12729147785 is an apocalyptic number.

It is an amenable number.

12729147785 is a deficient number, since it is larger than the sum of its proper divisors (2548437175).

12729147785 is an equidigital number, since it uses as much as digits as its factorization.

12729147785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434607.

The product of its digits is 1975680, while the sum is 53.

The spelling of 12729147785 in words is "twelve billion, seven hundred twenty-nine million, one hundred forty-seven thousand, seven hundred eighty-five".