16565371166121 has 8 divisors (see below), whose sum is σ = 22416820682784. Its totient is φ = 10878751213440.

The previous prime is 16565371166101. The next prime is 16565371166129. The reversal of 16565371166121 is 12166117356561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16565371166121 - 2¹¹ = 16565371164073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16565371166129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41207390760 + ... + 41207391161.

It is an arithmetic number, because the mean of its divisors is an integer number (2802102585348).

Almost surely, 2^{16565371166121} is an apocalyptic number.

It is an amenable number.

16565371166121 is a deficient number, since it is larger than the sum of its proper divisors (5851449516663).

16565371166121 is an equidigital number, since it uses as much as digits as its factorization.

16565371166121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82414781991.

The product of its digits is 1360800, while the sum is 51.

The spelling of 16565371166121 in words is "sixteen trillion, five hundred sixty-five billion, three hundred seventy-one million, one hundred sixty-six thousand, one hundred twenty-one".