13456642447 has 2 divisors, whose sum is σ = 13456642448. Its totient is φ = 13456642446.

The previous prime is 13456642429. The next prime is 13456642469. The reversal of 13456642447 is 74424665431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13456642447 - 2¹¹ = 13456640399 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13456642397 and 13456642406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13456642477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6728321223 + 6728321224.

It is an arithmetic number, because the mean of its divisors is an integer number (6728321224).

Almost surely, 2^13456642447 is an apocalyptic number.

13456642447 is a deficient number, since it is larger than the sum of its proper divisors (1).

13456642447 is an equidigital number, since it uses as much as digits as its factorization.

13456642447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1935360, while the sum is 46.

The spelling of 13456642447 in words is "thirteen billion, four hundred fifty-six million, six hundred forty-two thousand, four hundred forty-seven".