6443873689 has 16 divisors (see below), whose sum is σ = 7287071040. Its totient is φ = 5644408000.

The previous prime is 6443873687. The next prime is 6443873767. The reversal of 6443873689 is 9863783446.

It is not a de Polignac number, because 6443873689 - 2¹ = 6443873687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6443873687) 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, 136059 + ... + 177199.

It is an arithmetic number, because the mean of its divisors is an integer number (455441940).

Almost surely, 2^6443873689 is an apocalyptic number.

It is an amenable number.

6443873689 is a deficient number, since it is larger than the sum of its proper divisors (843197351).

6443873689 is a wasteful number, since it uses less digits than its factorization.

6443873689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41672.

The product of its digits is 20901888, while the sum is 58.

The square root of 6443873689 is about 80273.7422137526. The cubic root of 6443873689 is about 1860.8684510607.

The spelling of 6443873689 in words is "six billion, four hundred forty-three million, eight hundred seventy-three thousand, six hundred eighty-nine".