12781823675678 has 8 divisors (see below), whose sum is σ = 19294854848472. Its totient is φ = 6350205392856.

The previous prime is 12781823675627. The next prime is 12781823675681. The reversal of 12781823675678 is 87657632818721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12781823675678² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20353222100 + ... + 20353222727.

It is an arithmetic number, because the mean of its divisors is an integer number (2411856856059).

Almost surely, 2^{12781823675678} is an apocalyptic number.

12781823675678 is a deficient number, since it is larger than the sum of its proper divisors (6513031172794).

12781823675678 is a wasteful number, since it uses less digits than its factorization.

12781823675678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40706444986.

The product of its digits is 379330560, while the sum is 71.

The spelling of 12781823675678 in words is "twelve trillion, seven hundred eighty-one billion, eight hundred twenty-three million, six hundred seventy-five thousand, six hundred seventy-eight".