12756628905 has 16 divisors (see below), whose sum is σ = 20416314624. Its totient is φ = 6801632640.

The previous prime is 12756628813. The next prime is 12756628909. The reversal of 12756628905 is 50982665721.

It is not a de Polignac number, because 12756628905 - 2¹⁰ = 12756627881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12756628909) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 62644 + ... + 171573.

It is an arithmetic number, because the mean of its divisors is an integer number (1276019664).

Almost surely, 2^12756628905 is an apocalyptic number.

12756628905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12756628905 is a deficient number, since it is larger than the sum of its proper divisors (7659685719).

12756628905 is a wasteful number, since it uses less digits than its factorization.

12756628905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237856.

The product of its (nonzero) digits is 1814400, while the sum is 51.

The spelling of 12756628905 in words is "twelve billion, seven hundred fifty-six million, six hundred twenty-eight thousand, nine hundred five".