6449113681919 has 16 divisors (see below), whose sum is σ = 6718573010400. Its totient is φ = 6182862731136.

The previous prime is 6449113681903. The next prime is 6449113681949. The reversal of 6449113681919 is 9191863119446.

It is a cyclic number.

It is not a de Polignac number, because 6449113681919 - 2⁴ = 6449113681903 is a prime.

It is a super-2 number, since 2×6449113681919² (a number of 26 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6449113681949) 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, 4542497 + ... + 5790725.

It is an arithmetic number, because the mean of its divisors is an integer number (419910813150).

Almost surely, 2^{6449113681919} is an apocalyptic number.

6449113681919 is a deficient number, since it is larger than the sum of its proper divisors (269459328481).

6449113681919 is a wasteful number, since it uses less digits than its factorization.

6449113681919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249514.

The product of its digits is 10077696, while the sum is 62.

The spelling of 6449113681919 in words is "six trillion, four hundred forty-nine billion, one hundred thirteen million, six hundred eighty-one thousand, nine hundred nineteen".