6443820195 has 16 divisors (see below), whose sum is σ = 10311309312. Its totient is φ = 3436305120.

The previous prime is 6443820193. The next prime is 6443820203. The reversal of 6443820195 is 5910283446.

It is not a de Polignac number, because 6443820195 - 2¹ = 6443820193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6443820193) 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, 146664 + ... + 185466.

It is an arithmetic number, because the mean of its divisors is an integer number (644456832).

Almost surely, 2^6443820195 is an apocalyptic number.

6443820195 is a deficient number, since it is larger than the sum of its proper divisors (3867489117).

6443820195 is a wasteful number, since it uses less digits than its factorization.

6443820195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49882.

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 6443820195 is about 80273.4090156884. The cubic root of 6443820195 is about 1860.8633016957.

The spelling of 6443820195 in words is "six billion, four hundred forty-three million, eight hundred twenty thousand, one hundred ninety-five".