16605121016 has 32 divisors (see below), whose sum is σ = 34126030080. Its totient is φ = 7512002400.

The previous prime is 16605120979. The next prime is 16605121033. The reversal of 16605121016 is 61012150661.

It is a self number, because there is not a number n which added to its sum of digits gives 16605121016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428576 + ... + 465711.

It is an arithmetic number, because the mean of its divisors is an integer number (1066438440).

Almost surely, 2^16605121016 is an apocalyptic number.

It is an amenable number.

16605121016 is an abundant number, since it is smaller than the sum of its proper divisors (17520909064).

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

16605121016 is a wasteful number, since it uses less digits than its factorization.

16605121016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894515 (or 894511 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

Adding to 16605121016 its reverse (61012150661), we get a palindrome (77617271677).

The spelling of 16605121016 in words is "sixteen billion, six hundred five million, one hundred twenty-one thousand, sixteen".