6443476872 has 96 divisors (see below), whose sum is σ = 18781956000. Its totient is φ = 1836742656.

The previous prime is 6443476829. The next prime is 6443476877. The reversal of 6443476872 is 2786743446.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (6443476877) 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 23 ways as a sum of consecutive naturals, for example, 521923 + ... + 534125.

It is an arithmetic number, because the mean of its divisors is an integer number (195645375).

Almost surely, 2^6443476872 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 6443476872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9390978000).

6443476872 is an abundant number, since it is smaller than the sum of its proper divisors (12338479128).

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

6443476872 is a wasteful number, since it uses less digits than its factorization.

6443476872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12675 (or 12664 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 51.

The square root of 6443476872 is about 80271.2705268828. The cubic root of 6443476872 is about 1860.8302525365.

The spelling of 6443476872 in words is "six billion, four hundred forty-three million, four hundred seventy-six thousand, eight hundred seventy-two".