6878645440 has 56 divisors (see below), whose sum is σ = 16779313152. Its totient is φ = 2684344320.

The previous prime is 6878645429. The next prime is 6878645447. The reversal of 6878645440 is 445468786.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (6878645447) by changing a digit.

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, 249024 + ... + 275263.

It is an arithmetic number, because the mean of its divisors is an integer number (299630592).

Almost surely, 2^6878645440 is an apocalyptic number.

It is an amenable number.

6878645440 is an abundant number, since it is smaller than the sum of its proper divisors (9900667712).

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

6878645440 is a wasteful number, since it uses less digits than its factorization.

6878645440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524345 (or 524335 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 52.

The square root of 6878645440 is about 82937.5996759009. The cubic root of 6878645440 is about 1901.8122542691.

The spelling of 6878645440 in words is "six billion, eight hundred seventy-eight million, six hundred forty-five thousand, four hundred forty".