6644242442 has 8 divisors (see below), whose sum is σ = 9986663232. Its totient is φ = 3315354700.

The previous prime is 6644242393. The next prime is 6644242457. The reversal of 6644242442 is 2442424466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 6644242396 and 6644242405.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3382034 + ... + 3383997.

It is an arithmetic number, because the mean of its divisors is an integer number (1248332904).

Almost surely, 2^6644242442 is an apocalyptic number.

6644242442 is a deficient number, since it is larger than the sum of its proper divisors (3342420790).

6644242442 is a wasteful number, since it uses less digits than its factorization.

6644242442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6766524.

The product of its digits is 294912, while the sum is 38.

The square root of 6644242442 is about 81512.2226540290. Note that the first 3 decimals coincide. The cubic root of 6644242442 is about 1879.9594870174.

The spelling of 6644242442 in words is "six billion, six hundred forty-four million, two hundred forty-two thousand, four hundred forty-two".