16165110505 has 8 divisors (see below), whose sum is σ = 19764135432. Its totient is φ = 12688086528.

The previous prime is 16165110503. The next prime is 16165110547. The reversal of 16165110505 is 50501156161.

It can be written as a sum of positive squares in 4 ways, for example, as 1537659369 + 14627451136 = 39213^2 + 120944^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 16165110505 - 2¹ = 16165110503 is a prime.

It is a super-2 number, since 2×16165110505² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16165110503) 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, 30499944 + ... + 30500473.

It is an arithmetic number, because the mean of its divisors is an integer number (2470516929).

Almost surely, 2^16165110505 is an apocalyptic number.

It is an amenable number.

16165110505 is a deficient number, since it is larger than the sum of its proper divisors (3599024927).

16165110505 is an equidigital number, since it uses as much as digits as its factorization.

16165110505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61000475.

The product of its (nonzero) digits is 4500, while the sum is 31.

Adding to 16165110505 its reverse (50501156161), we get a palindrome (66666266666).

It can be divided in two parts, 1616 and 5110505, that added together give a square (5112121 = 2261²).

The spelling of 16165110505 in words is "sixteen billion, one hundred sixty-five million, one hundred ten thousand, five hundred five".