16442665556406 has 8 divisors (see below), whose sum is σ = 32885331112824. Its totient is φ = 5480888518800.

The previous prime is 16442665556399. The next prime is 16442665556501. The reversal of 16442665556406 is 60465556624461.

It is a sphenic number, since it is the product of 3 distinct primes.

16442665556406 is an admirable number.

It is a super-3 number, since 3×16442665556406³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 16442665556406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1370222129695 + ... + 1370222129706.

It is an arithmetic number, because the mean of its divisors is an integer number (4110666389103).

Almost surely, 2^{16442665556406} is an apocalyptic number.

16442665556406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16442665556406 is a wasteful number, since it uses less digits than its factorization.

16442665556406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740444259406.

The product of its (nonzero) digits is 124416000, while the sum is 60.

The spelling of 16442665556406 in words is "sixteen trillion, four hundred forty-two billion, six hundred sixty-five million, five hundred fifty-six thousand, four hundred six".