13440668047 has 12 divisors (see below), whose sum is σ = 14123677320. Its totient is φ = 12786584880.

The previous prime is 13440668041. The next prime is 13440668057. The reversal of 13440668047 is 74086604431.

It is not a de Polignac number, because 13440668047 - 2¹⁵ = 13440635279 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13440667994 and 13440668012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13440668041) 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 in 11 ways as a sum of consecutive naturals, for example, 61828 + ... + 175225.

It is an arithmetic number, because the mean of its divisors is an integer number (1176973110).

Almost surely, 2^13440668047 is an apocalyptic number.

13440668047 is a deficient number, since it is larger than the sum of its proper divisors (683009273).

13440668047 is an equidigital number, since it uses as much as digits as its factorization.

13440668047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237174 (or 237143 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 43.

The spelling of 13440668047 in words is "thirteen billion, four hundred forty million, six hundred sixty-eight thousand, forty-seven".