6784778260728 has 96 divisors (see below), whose sum is σ = 19808474343840. Its totient is φ = 2085562955520.

The previous prime is 6784778260693. The next prime is 6784778260759. The reversal of 6784778260728 is 8270628774876.

6784778260728 is a `hidden beast` number, since 6 + 7 + 8 + 4 + 7 + 7 + 8 + 2 + 607 + 2 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2629668 + ... + 4526003.

It is an arithmetic number, because the mean of its divisors is an integer number (206338274415).

Almost surely, 2^{6784778260728} is an apocalyptic number.

It is an amenable number.

6784778260728 is an abundant number, since it is smaller than the sum of its proper divisors (13023696083112).

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

6784778260728 is a wasteful number, since it uses less digits than its factorization.

6784778260728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7156709 (or 7156702 counting only the distinct ones).

The product of its (nonzero) digits is 708083712, while the sum is 72.

The spelling of 6784778260728 in words is "six trillion, seven hundred eighty-four billion, seven hundred seventy-eight million, two hundred sixty thousand, seven hundred twenty-eight".