161816116 has 24 divisors (see below), whose sum is σ = 353054016. Its totient is φ = 63045120.

The previous prime is 161816101. The next prime is 161816117. The reversal of 161816116 is 611618161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161816117) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 262381 + ... + 262996.

It is an arithmetic number, because the mean of its divisors is an integer number (14710584).

Almost surely, 2^161816116 is an apocalyptic number.

It is an amenable number.

161816116 is an abundant number, since it is smaller than the sum of its proper divisors (191237900).

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

161816116 is a wasteful number, since it uses less digits than its factorization.

161816116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525399 (or 525397 counting only the distinct ones).

The product of its digits is 1728, while the sum is 31.

The square root of 161816116 is about 12720.6963645863. The cubic root of 161816116 is about 544.9298408690.

The spelling of 161816116 in words is "one hundred sixty-one million, eight hundred sixteen thousand, one hundred sixteen".