16004121660165 has 8 divisors (see below), whose sum is σ = 25606594656288. Its totient is φ = 8535531552080.

The previous prime is 16004121660151. The next prime is 16004121660221. The reversal of 16004121660165 is 56106612140061.

It is a happy number.

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

It is not a de Polignac number, because 16004121660165 - 2¹⁴ = 16004121643781 is a prime.

It is a super-2 number, since 2×16004121660165² (a number of 27 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 in 7 ways as a sum of consecutive naturals, for example, 533470721991 + ... + 533470722020.

It is an arithmetic number, because the mean of its divisors is an integer number (3200824332036).

Almost surely, 2^{16004121660165} is an apocalyptic number.

16004121660165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16004121660165 is a deficient number, since it is larger than the sum of its proper divisors (9602472996123).

16004121660165 is a wasteful number, since it uses less digits than its factorization.

16004121660165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066941444019.

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 16004121660165 in words is "sixteen trillion, four billion, one hundred twenty-one million, six hundred sixty thousand, one hundred sixty-five".