12781831783367 has 4 divisors (see below), whose sum is σ = 12795243989760. Its totient is φ = 12768419576976.

The previous prime is 12781831783327. The next prime is 12781831783403. The reversal of 12781831783367 is 76338713818721.

It is a happy number.

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 12781831783367 - 2³² = 12777536816071 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 (12781831783327) 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, 6706101767 + ... + 6706103672.

It is an arithmetic number, because the mean of its divisors is an integer number (3198810997440).

Almost surely, 2^{12781831783367} is an apocalyptic number.

12781831783367 is a deficient number, since it is larger than the sum of its proper divisors (13412206393).

12781831783367 is an equidigital number, since it uses as much as digits as its factorization.

12781831783367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13412206392.

The product of its digits is 56899584, while the sum is 65.

The spelling of 12781831783367 in words is "twelve trillion, seven hundred eighty-one billion, eight hundred thirty-one million, seven hundred eighty-three thousand, three hundred sixty-seven".