12684562905 has 64 divisors (see below), whose sum is σ = 24766156800. Its totient is φ = 5417508096.

The previous prime is 12684562901. The next prime is 12684563009. The reversal of 12684562905 is 50926548621.

12684562905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12684562905 - 2² = 12684562901 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12684562901) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 42771 + ... + 164919.

It is an arithmetic number, because the mean of its divisors is an integer number (386971200).

Almost surely, 2^12684562905 is an apocalyptic number.

12684562905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12684562905 is a deficient number, since it is larger than the sum of its proper divisors (12081593895).

12684562905 is a wasteful number, since it uses less digits than its factorization.

12684562905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122230.

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 12684562905 in words is "twelve billion, six hundred eighty-four million, five hundred sixty-two thousand, nine hundred five".