16163533165 has 8 divisors (see below), whose sum is σ = 20888258328. Its totient is φ = 11936147520.

The previous prime is 16163533159. The next prime is 16163533181. The reversal of 16163533165 is 56133536161.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2094252169 + 14069280996 = 45763^2 + 118614^2 .

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

It is not a de Polignac number, because 16163533165 - 2⁹ = 16163532653 is a prime.

It is a super-2 number, since 2×16163533165² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

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, 124334806 + ... + 124334935.

It is an arithmetic number, because the mean of its divisors is an integer number (2611032291).

Almost surely, 2^16163533165 is an apocalyptic number.

It is an amenable number.

16163533165 is a deficient number, since it is larger than the sum of its proper divisors (4724725163).

16163533165 is a wasteful number, since it uses less digits than its factorization.

16163533165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248669759.

The product of its digits is 145800, while the sum is 40.

The spelling of 16163533165 in words is "sixteen billion, one hundred sixty-three million, five hundred thirty-three thousand, one hundred sixty-five".