6778308875544 has 104 divisors (see below), whose sum is σ = 19063993712460. Its totient is φ = 2259436291848.

The previous prime is 6778308875497. The next prime is 6778308875573. The reversal of 6778308875544 is 4455788038776.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

6778308875544 is a `hidden beast` number, since 6 + 7 + 7 + 8 + 3 + 0 + 8 + 8 + 75 + 544 = 666.

It is an ABA number since it can be written as A⋅B^A, here for A=24, B=3.

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

It is a nialpdrome in base 3.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 25 ways as a sum of consecutive naturals, for example, 2259436291847 + 2259436291848 + 2259436291849.

Almost surely, 2^{6778308875544} 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 6778308875544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9531996856230).

6778308875544 is an abundant number, since it is smaller than the sum of its proper divisors (12285684836916).

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

6778308875544 is an frugal number, since it uses more digits than its factorization.

6778308875544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 5 counting only the distinct ones).

The product of its (nonzero) digits is 1264435200, while the sum is 72.

Multiplying 6778308875544 by its sum of digits (72), we get a cube (488038239039168 = 78732³).

6778308875544 divided by its sum of digits (72) gives a 23-rd power (94143178827 = 3²³).

The spelling of 6778308875544 in words is "six trillion, seven hundred seventy-eight billion, three hundred eight million, eight hundred seventy-five thousand, five hundred forty-four".