6644042356 has 12 divisors (see below), whose sum is σ = 13288084768. Its totient is φ = 2847446712.

The previous prime is 6644042351. The next prime is 6644042369. The reversal of 6644042356 is 6532404466.

6644042356 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6644042351) 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 3 ways as a sum of consecutive naturals, for example, 118643586 + ... + 118643641.

Almost surely, 2^6644042356 is an apocalyptic number.

It is an amenable number.

6644042356 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6644042356 is a wasteful number, since it uses less digits than its factorization.

6644042356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237287238 (or 237287236 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 40.

The square root of 6644042356 is about 81510.9953073817. The cubic root of 6644042356 is about 1879.9406156736.

The spelling of 6644042356 in words is "six billion, six hundred forty-four million, forty-two thousand, three hundred fifty-six".