6443847085 has 16 divisors (see below), whose sum is σ = 8596062720. Its totient is φ = 4605030720.

The previous prime is 6443847077. The next prime is 6443847097. The reversal of 6443847085 is 5807483446.

It is not a de Polignac number, because 6443847085 - 2³ = 6443847077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1596955 + ... + 1600984.

It is an arithmetic number, because the mean of its divisors is an integer number (537253920).

Almost surely, 2^6443847085 is an apocalyptic number.

6443847085 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6443847085 is a deficient number, since it is larger than the sum of its proper divisors (2152215635).

6443847085 is a wasteful number, since it uses less digits than its factorization.

6443847085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3197988.

The product of its (nonzero) digits is 2580480, while the sum is 49.

The square root of 6443847085 is about 80273.5765055974. The cubic root of 6443847085 is about 1860.8658901470.

The spelling of 6443847085 in words is "six billion, four hundred forty-three million, eight hundred forty-seven thousand, eighty-five".