6424644444 has 24 divisors (see below), whose sum is σ = 15196193040. Its totient is φ = 2112211584.

The previous prime is 6424644433. The next prime is 6424644463. The reversal of 6424644444 is 4444464246.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 6424644396 and 6424644405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3666159 + ... + 3667910.

It is an arithmetic number, because the mean of its divisors is an integer number (633174710).

Almost surely, 2^6424644444 is an apocalyptic number.

It is an amenable number.

6424644444 is an abundant number, since it is smaller than the sum of its proper divisors (8771548596).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6424644444 is a wasteful number, since it uses less digits than its factorization.

6424644444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7334149 (or 7334147 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 42.

The square root of 6424644444 is about 80153.8797813306. The cubic root of 6424644444 is about 1859.0155930952.

The spelling of 6424644444 in words is "six billion, four hundred twenty-four million, six hundred forty-four thousand, four hundred forty-four".