12644454443134 has 4 divisors (see below), whose sum is σ = 18966681664704. Its totient is φ = 6322227221566.

The previous prime is 12644454443123. The next prime is 12644454443141. The reversal of 12644454443134 is 43134445444621.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3161113610782 + ... + 3161113610785.

It is an arithmetic number, because the mean of its divisors is an integer number (4741670416176).

Almost surely, 2^{12644454443134} is an apocalyptic number.

12644454443134 is a deficient number, since it is larger than the sum of its proper divisors (6322227221570).

12644454443134 is an equidigital number, since it uses as much as digits as its factorization.

12644454443134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6322227221569.

The product of its digits is 8847360, while the sum is 49.

Adding to 12644454443134 its reverse (43134445444621), we get a palindrome (55778899887755).

The spelling of 12644454443134 in words is "twelve trillion, six hundred forty-four billion, four hundred fifty-four million, four hundred forty-three thousand, one hundred thirty-four".