16801665216 has 112 divisors (see below), whose sum is σ = 53793639936. Its totient is φ = 4518088704.

The previous prime is 16801665161. The next prime is 16801665229. The reversal of 16801665216 is 61256610861.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 344836 + ... + 390531.

Almost surely, 2^16801665216 is an apocalyptic number.

16801665216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16801665216 is an abundant number, since it is smaller than the sum of its proper divisors (36991974720).

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

16801665216 is a wasteful number, since it uses less digits than its factorization.

16801665216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735406 (or 735396 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 16801665216 in words is "sixteen billion, eight hundred one million, six hundred sixty-five thousand, two hundred sixteen".