12466553456543 has 4 divisors (see below), whose sum is σ = 12466681469880. Its totient is φ = 12466425443208.

The previous prime is 12466553456509. The next prime is 12466553456549. The reversal of 12466553456543 is 34565435566421.

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

It is a cyclic number.

It is not a de Polignac number, because 12466553456543 - 2¹² = 12466553452447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12466553456549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63860480 + ... + 64055397.

It is an arithmetic number, because the mean of its divisors is an integer number (3116670367470).

Almost surely, 2^{12466553456543} is an apocalyptic number.

12466553456543 is a deficient number, since it is larger than the sum of its proper divisors (128013337).

12466553456543 is an equidigital number, since it uses as much as digits as its factorization.

12466553456543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128013336.

The product of its digits is 155520000, while the sum is 59.

The spelling of 12466553456543 in words is "twelve trillion, four hundred sixty-six billion, five hundred fifty-three million, four hundred fifty-six thousand, five hundred forty-three".