13781856467 has 2 divisors, whose sum is σ = 13781856468. Its totient is φ = 13781856466.

The previous prime is 13781856449. The next prime is 13781856617. The reversal of 13781856467 is 76465818731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13781856467 - 2²⁰ = 13780807891 is a prime.

It is not a weakly prime, because it can be changed into another prime (13781856167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6890928233 + 6890928234.

It is an arithmetic number, because the mean of its divisors is an integer number (6890928234).

Almost surely, 2^13781856467 is an apocalyptic number.

13781856467 is a deficient number, since it is larger than the sum of its proper divisors (1).

13781856467 is an equidigital number, since it uses as much as digits as its factorization.

13781856467 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6773760, while the sum is 56.

The spelling of 13781856467 in words is "thirteen billion, seven hundred eighty-one million, eight hundred fifty-six thousand, four hundred sixty-seven".