12664351650043 has 4 divisors (see below), whose sum is σ = 12664616969808. Its totient is φ = 12664086330280.

The previous prime is 12664351650031. The next prime is 12664351650077. The reversal of 12664351650043 is 34005615346621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12664351650043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12664351649975 and 12664351650002.

It is not an unprimeable number, because it can be changed into a prime (12664351650143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132588271 + ... + 132683752.

It is an arithmetic number, because the mean of its divisors is an integer number (3166154242452).

Almost surely, 2^{12664351650043} is an apocalyptic number.

12664351650043 is a deficient number, since it is larger than the sum of its proper divisors (265319765).

12664351650043 is an equidigital number, since it uses as much as digits as its factorization.

12664351650043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265319764.

The product of its (nonzero) digits is 1555200, while the sum is 46.

Adding to 12664351650043 its reverse (34005615346621), we get a palindrome (46669966996664).

The spelling of 12664351650043 in words is "twelve trillion, six hundred sixty-four billion, three hundred fifty-one million, six hundred fifty thousand, forty-three".