161116500 has 96 divisors (see below), whose sum is σ = 482017536. Its totient is φ = 41788800.

The previous prime is 161116481. The next prime is 161116573. The reversal of 161116500 is 5611161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54049 + ... + 56951.

It is an arithmetic number, because the mean of its divisors is an integer number (5021016).

Almost surely, 2^161116500 is an apocalyptic number.

161116500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161116500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241008768).

161116500 is an abundant number, since it is smaller than the sum of its proper divisors (320901036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161116500 is a wasteful number, since it uses less digits than its factorization.

161116500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2962 (or 2950 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 161116500 is about 12693.1674533979. The cubic root of 161116500 is about 544.1433670937.

Adding to 161116500 its reverse (5611161), we get a palindrome (166727661).

The spelling of 161116500 in words is "one hundred sixty-one million, one hundred sixteen thousand, five hundred".