16678136805408 has 108 divisors (see below), whose sum is σ = 51357435841530. Its totient is φ = 5131734386688.

The previous prime is 16678136805353. The next prime is 16678136805439. The reversal of 16678136805408 is 80450863187661.

16678136805408 is a `hidden beast` number, since 1 + 6 + 6 + 7 + 8 + 1 + 3 + 6 + 80 + 540 + 8 = 666.

16678136805408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 3733597791504 + 12944539013904 = 1932252^2 + 3597852^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 171283273 + ... + 171380616.

Almost surely, 2^{16678136805408} is an apocalyptic number.

16678136805408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16678136805408 is an abundant number, since it is smaller than the sum of its proper divisors (34679299036122).

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

16678136805408 is a wasteful number, since it uses less digits than its factorization.

16678136805408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342663931 (or 342663907 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 63.

The spelling of 16678136805408 in words is "sixteen trillion, six hundred seventy-eight billion, one hundred thirty-six million, eight hundred five thousand, four hundred eight".