6556854215808 has 384 divisors, whose sum is σ = 20530549494000. Its totient is φ = 1996630917120.

The previous prime is 6556854215789. The next prime is 6556854215819. The reversal of 6556854215808 is 8085124586556.

6556854215808 is a `hidden beast` number, since 6 + 5 + 5 + 6 + 8 + 5 + 42 + 1 + 580 + 8 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 2704867043904 + 3851987171904 = 1644648^2 + 1962648^2 .

It is a tau number, because it is divible by the number of its divisors (384).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 627024916 + ... + 627035372.

Almost surely, 2^{6556854215808} 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 6556854215808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10265274747000).

6556854215808 is an abundant number, since it is smaller than the sum of its proper divisors (13973695278192).

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

6556854215808 is a wasteful number, since it uses less digits than its factorization.

6556854215808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10920 (or 10905 counting only the distinct ones).

The product of its (nonzero) digits is 92160000, while the sum is 63.

The spelling of 6556854215808 in words is "six trillion, five hundred fifty-six billion, eight hundred fifty-four million, two hundred fifteen thousand, eight hundred eight".