12781367168437 has 16 divisors (see below), whose sum is σ = 15245531799552. Its totient is φ = 10476963549360.

The previous prime is 12781367168417. The next prime is 12781367168441. The reversal of 12781367168437 is 73486176318721.

It is not a de Polignac number, because 12781367168437 - 2⁴³ = 3985274146229 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 (12781367168417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7438663 + ... + 8994244.

It is an arithmetic number, because the mean of its divisors is an integer number (952845737472).

Almost surely, 2^{12781367168437} is an apocalyptic number.

It is an amenable number.

12781367168437 is a deficient number, since it is larger than the sum of its proper divisors (2464164631115).

12781367168437 is a wasteful number, since it uses less digits than its factorization.

12781367168437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16437768.

The product of its digits is 56899584, while the sum is 64.

The spelling of 12781367168437 in words is "twelve trillion, seven hundred eighty-one billion, three hundred sixty-seven million, one hundred sixty-eight thousand, four hundred thirty-seven".