20161116169 has 4 divisors (see below), whose sum is σ = 20163507460. Its totient is φ = 20158724880.

The previous prime is 20161116167. The next prime is 20161116179. The reversal of 20161116169 is 96161116102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6116022025 + 14045094144 = 78205^2 + 118512^2 .

It is a cyclic number.

It is not a de Polignac number, because 20161116169 - 2¹ = 20161116167 is a prime.

It is a super-2 number, since 2×20161116169² (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 (20161116167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1182954 + ... + 1199875.

It is an arithmetic number, because the mean of its divisors is an integer number (5040876865).

Almost surely, 2^20161116169 is an apocalyptic number.

It is an amenable number.

20161116169 is a deficient number, since it is larger than the sum of its proper divisors (2391291).

20161116169 is an equidigital number, since it uses as much as digits as its factorization.

20161116169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391290.

The product of its (nonzero) digits is 3888, while the sum is 34.

The spelling of 20161116169 in words is "twenty billion, one hundred sixty-one million, one hundred sixteen thousand, one hundred sixty-nine".