12278254666463 has 4 divisors (see below), whose sum is σ = 12701642758440. Its totient is φ = 11854866574488.

The previous prime is 12278254666417. The next prime is 12278254666501. The reversal of 12278254666463 is 36466645287221.

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 12278254666463 - 2²⁰ = 12278253617887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12278254666396 and 12278254666405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12278254666663) 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, 211694045945 + ... + 211694046002.

It is an arithmetic number, because the mean of its divisors is an integer number (3175410689610).

Almost surely, 2^{12278254666463} is an apocalyptic number.

12278254666463 is a deficient number, since it is larger than the sum of its proper divisors (423388091977).

12278254666463 is an equidigital number, since it uses as much as digits as its factorization.

12278254666463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423388091976.

The product of its digits is 139345920, while the sum is 62.

The spelling of 12278254666463 in words is "twelve trillion, two hundred seventy-eight billion, two hundred fifty-four million, six hundred sixty-six thousand, four hundred sixty-three".