6878657856 has 224 divisors, whose sum is σ = 22039234560. Its totient is φ = 1849595904.

The previous prime is 6878657809. The next prime is 6878657869. The reversal of 6878657856 is 6587568786.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4263706 + ... + 4265318.

It is an arithmetic number, because the mean of its divisors is an integer number (98389440).

Almost surely, 2^6878657856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6878657856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11019617280).

6878657856 is an abundant number, since it is smaller than the sum of its proper divisors (15160576704).

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

6878657856 is a wasteful number, since it uses less digits than its factorization.

6878657856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821 (or 1811 counting only the distinct ones).

The product of its digits is 135475200, while the sum is 66.

The square root of 6878657856 is about 82937.6745273220. The cubic root of 6878657856 is about 1901.8133985296.

The spelling of 6878657856 in words is "six billion, eight hundred seventy-eight million, six hundred fifty-seven thousand, eight hundred fifty-six".