16805389112 has 8 divisors (see below), whose sum is σ = 31510104600. Its totient is φ = 8402694552.

The previous prime is 16805389109. The next prime is 16805389127. The reversal of 16805389112 is 21198350861.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×16805389112² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050336812 + ... + 1050336827.

It is an arithmetic number, because the mean of its divisors is an integer number (3938763075).

Almost surely, 2^16805389112 is an apocalyptic number.

It is an amenable number.

16805389112 is a deficient number, since it is larger than the sum of its proper divisors (14704715488).

16805389112 is a wasteful number, since it uses less digits than its factorization.

16805389112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100673645 (or 2100673641 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 44.

The spelling of 16805389112 in words is "sixteen billion, eight hundred five million, three hundred eighty-nine thousand, one hundred twelve".