13449681408 has 80 divisors (see below), whose sum is σ = 35958564576. Its totient is φ = 4467240960.

The previous prime is 13449681407. The next prime is 13449681419. The reversal of 13449681408 is 80418694431.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (13449681407) 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 7 ways as a sum of consecutive naturals, for example, 419218 + ... + 450158.

Almost surely, 2^13449681408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13449681408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17979282288).

13449681408 is an abundant number, since it is smaller than the sum of its proper divisors (22508883168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13449681408 is an equidigital number, since it uses as much as digits as its factorization.

13449681408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31245 (or 31229 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 48.

The spelling of 13449681408 in words is "thirteen billion, four hundred forty-nine million, six hundred eighty-one thousand, four hundred eight".