6378849656 has 8 divisors (see below), whose sum is σ = 11960343120. Its totient is φ = 3189424824.

The previous prime is 6378849641. The next prime is 6378849677. The reversal of 6378849656 is 6569488736.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398678096 + ... + 398678111.

It is an arithmetic number, because the mean of its divisors is an integer number (1495042890).

Almost surely, 2^6378849656 is an apocalyptic number.

It is an amenable number.

6378849656 is a deficient number, since it is larger than the sum of its proper divisors (5581493464).

6378849656 is a wasteful number, since it uses less digits than its factorization.

6378849656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797356213 (or 797356209 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 62.

The square root of 6378849656 is about 79867.7009560185. The cubic root of 6378849656 is about 1854.5880429660.

The spelling of 6378849656 in words is "six billion, three hundred seventy-eight million, eight hundred forty-nine thousand, six hundred fifty-six".