6444020420371 has 4 divisors (see below), whose sum is σ = 6448091186592. Its totient is φ = 6439949654152.

The previous prime is 6444020420351. The next prime is 6444020420377. The reversal of 6444020420371 is 1730240204446.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 6444020420371 - 2³³ = 6435430485779 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6444020420371.

It is not an unprimeable number, because it can be changed into a prime (6444020420377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2035380736 + ... + 2035383901.

It is an arithmetic number, because the mean of its divisors is an integer number (1612022796648).

Almost surely, 2^{6444020420371} is an apocalyptic number.

6444020420371 is a deficient number, since it is larger than the sum of its proper divisors (4070766221).

6444020420371 is a wasteful number, since it uses less digits than its factorization.

6444020420371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4070766220.

The product of its (nonzero) digits is 129024, while the sum is 37.

The spelling of 6444020420371 in words is "six trillion, four hundred forty-four billion, twenty million, four hundred twenty thousand, three hundred seventy-one".