6443626143 has 4 divisors (see below), whose sum is σ = 8591501528. Its totient is φ = 4295750760.

The previous prime is 6443626141. The next prime is 6443626193. The reversal of 6443626143 is 3416263446.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6443626143 - 2¹ = 6443626141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6443626141) 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, 1073937688 + ... + 1073937693.

It is an arithmetic number, because the mean of its divisors is an integer number (2147875382).

Almost surely, 2^6443626143 is an apocalyptic number.

6443626143 is a deficient number, since it is larger than the sum of its proper divisors (2147875385).

6443626143 is a wasteful number, since it uses less digits than its factorization.

6443626143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147875384.

The product of its digits is 248832, while the sum is 39.

The square root of 6443626143 is about 80272.2003124369. The cubic root of 6443626143 is about 1860.8446218930.

Adding to 6443626143 its reverse (3416263446), we get a palindrome (9859889589).

The spelling of 6443626143 in words is "six billion, four hundred forty-three million, six hundred twenty-six thousand, one hundred forty-three".