12778486842443 has 4 divisors (see below), whose sum is σ = 14603984962800. Its totient is φ = 10952988722088.

The previous prime is 12778486842389. The next prime is 12778486842461. The reversal of 12778486842443 is 34424868487721.

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

It is not a de Polignac number, because 12778486842443 - 2⁶ = 12778486842379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12778486842743) 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, 912749060168 + ... + 912749060181.

It is an arithmetic number, because the mean of its divisors is an integer number (3650996240700).

Almost surely, 2^{12778486842443} is an apocalyptic number.

12778486842443 is a deficient number, since it is larger than the sum of its proper divisors (1825498120357).

12778486842443 is an equidigital number, since it uses as much as digits as its factorization.

12778486842443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825498120356.

The product of its digits is 462422016, while the sum is 68.

The spelling of 12778486842443 in words is "twelve trillion, seven hundred seventy-eight billion, four hundred eighty-six million, eight hundred forty-two thousand, four hundred forty-three".