161116563 has 8 divisors (see below), whose sum is σ = 214922176. Its totient is φ = 107361000.

The previous prime is 161116481. The next prime is 161116573. The reversal of 161116563 is 365611161.

161116563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 161116563 - 2⁹ = 161116051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161116563.

It is not an unprimeable number, because it can be changed into a prime (161116573) 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, 4213 + ... + 18438.

It is an arithmetic number, because the mean of its divisors is an integer number (26865272).

Almost surely, 2^161116563 is an apocalyptic number.

161116563 is a deficient number, since it is larger than the sum of its proper divisors (53805613).

161116563 is a wasteful number, since it uses less digits than its factorization.

161116563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25025.

The product of its digits is 3240, while the sum is 30.

The square root of 161116563 is about 12693.1699350477. The cubic root of 161116563 is about 544.1434380176.

The spelling of 161116563 in words is "one hundred sixty-one million, one hundred sixteen thousand, five hundred sixty-three".