6443820194 has 16 divisors (see below), whose sum is σ = 11102064000. Its totient is φ = 2747758464.

The previous prime is 6443820193. The next prime is 6443820203. The reversal of 6443820194 is 4910283446.

It is not an unprimeable number, because it can be changed into a prime (6443820193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1153679 + ... + 1159250.

It is an arithmetic number, because the mean of its divisors is an integer number (693879000).

Almost surely, 2^6443820194 is an apocalyptic number.

6443820194 is a deficient number, since it is larger than the sum of its proper divisors (4658243806).

6443820194 is a wasteful number, since it uses less digits than its factorization.

6443820194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2313137.

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 6443820194 is about 80273.4090094597. The cubic root of 6443820194 is about 1860.8633015994.

The spelling of 6443820194 in words is "six billion, four hundred forty-three million, eight hundred twenty thousand, one hundred ninety-four".