6444448919 has 8 divisors (see below), whose sum is σ = 6654046848. Its totient is φ = 6234958080.

The previous prime is 6444448903. The next prime is 6444448943. The reversal of 6444448919 is 9198444446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6444448919 - 2⁴ = 6444448903 is a prime.

It is a super-2 number, since 2×6444448919² = 83061843739200537122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6444448999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106079 + ... + 155375.

It is an arithmetic number, because the mean of its divisors is an integer number (831755856).

Almost surely, 2^6444448919 is an apocalyptic number.

6444448919 is a deficient number, since it is larger than the sum of its proper divisors (209597929).

6444448919 is a wasteful number, since it uses less digits than its factorization.

6444448919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53545.

The product of its digits is 3981312, while the sum is 53.

The square root of 6444448919 is about 80277.3250613148. The cubic root of 6444448919 is about 1860.9238212495.

The spelling of 6444448919 in words is "six billion, four hundred forty-four million, four hundred forty-eight thousand, nine hundred nineteen".