12646341643 has 16 divisors (see below), whose sum is σ = 14228859456. Its totient is φ = 11152183680.

The previous prime is 12646341641. The next prime is 12646341649. The reversal of 12646341643 is 34614364621.

It is a cyclic number.

It is not a de Polignac number, because 12646341643 - 2¹ = 12646341641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12646341596 and 12646341605.

It is not an unprimeable number, because it can be changed into a prime (12646341641) 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, 219721 + ... + 271237.

It is an arithmetic number, because the mean of its divisors is an integer number (889303716).

Almost surely, 2^12646341643 is an apocalyptic number.

12646341643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12646341643 is a deficient number, since it is larger than the sum of its proper divisors (1582517813).

12646341643 is a wasteful number, since it uses less digits than its factorization.

12646341643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52374.

The product of its digits is 248832, while the sum is 40.

The spelling of 12646341643 in words is "twelve billion, six hundred forty-six million, three hundred forty-one thousand, six hundred forty-three".