16656803572416 has 672 divisors, whose sum is σ = 54730947119040. Its totient is φ = 4442273611776.

The previous prime is 16656803572373. The next prime is 16656803572441. The reversal of 16656803572416 is 61427530865661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (672).

It is a self number, because there is not a number n which added to its sum of digits gives 16656803572416.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11463731946 + ... + 11463733398.

Almost surely, 2^{16656803572416} is an apocalyptic number.

16656803572416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16656803572416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27365473559520).

16656803572416 is an abundant number, since it is smaller than the sum of its proper divisors (38074143546624).

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

16656803572416 is a wasteful number, since it uses less digits than its factorization.

16656803572416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041 (or 2024 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 60.

The spelling of 16656803572416 in words is "sixteen trillion, six hundred fifty-six billion, eight hundred three million, five hundred seventy-two thousand, four hundred sixteen".