6728809523840 has 64 divisors (see below), whose sum is σ = 16110923794560. Its totient is φ = 2687363638272.

The previous prime is 6728809523809. The next prime is 6728809523851. The reversal of 6728809523840 is 483259088276.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7710932 + ... + 8539091.

It is an arithmetic number, because the mean of its divisors is an integer number (251733184290).

Almost surely, 2^{6728809523840} is an apocalyptic number.

It is an amenable number.

6728809523840 is an abundant number, since it is smaller than the sum of its proper divisors (9382114270720).

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

6728809523840 is a wasteful number, since it uses less digits than its factorization.

6728809523840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16250689 (or 16250677 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 62.

The spelling of 6728809523840 in words is "six trillion, seven hundred twenty-eight billion, eight hundred nine million, five hundred twenty-three thousand, eight hundred forty".