6447277744 has 20 divisors (see below), whose sum is σ = 13226401224. Its totient is φ = 3034012928.

The previous prime is 6447277741. The next prime is 6447277751. The reversal of 6447277744 is 4477727446.

It is a junction number, because it is equal to n+sod(n) for n = 6447277691 and 6447277700.

It is not an unprimeable number, because it can be changed into a prime (6447277741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11851342 + ... + 11851885.

Almost surely, 2^6447277744 is an apocalyptic number.

It is an amenable number.

6447277744 is an abundant number, since it is smaller than the sum of its proper divisors (6779123480).

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

6447277744 is a wasteful number, since it uses less digits than its factorization.

6447277744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23703252 (or 23703246 counting only the distinct ones).

The product of its digits is 7375872, while the sum is 52.

The square root of 6447277744 is about 80294.9422068414. The cubic root of 6447277744 is about 1861.1960688758.

The spelling of 6447277744 in words is "six billion, four hundred forty-seven million, two hundred seventy-seven thousand, seven hundred forty-four".