16650555005161 has 16 divisors (see below), whose sum is σ = 20759433805440. Its totient is φ = 12974270762880.

The previous prime is 16650555005159. The next prime is 16650555005261. The reversal of 16650555005161 is 16150055505661.

It is a happy number.

It is not a de Polignac number, because 16650555005161 - 2¹ = 16650555005159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16650555005131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3917475 + ... + 6974791.

It is an arithmetic number, because the mean of its divisors is an integer number (1297464612840).

Almost surely, 2^{16650555005161} is an apocalyptic number.

16650555005161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16650555005161 is a deficient number, since it is larger than the sum of its proper divisors (4108878800279).

16650555005161 is a wasteful number, since it uses less digits than its factorization.

16650555005161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3128064.

The product of its (nonzero) digits is 675000, while the sum is 46.

The spelling of 16650555005161 in words is "sixteen trillion, six hundred fifty billion, five hundred fifty-five million, five thousand, one hundred sixty-one".