161018099 has 8 divisors (see below), whose sum is σ = 179394048. Its totient is φ = 143265160.

The previous prime is 161018089. The next prime is 161018113. The reversal of 161018099 is 990810161.

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

It is a cyclic number.

It is not a de Polignac number, because 161018099 - 2¹⁶ = 160952563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161018059) 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, 155207 + ... + 156240.

It is an arithmetic number, because the mean of its divisors is an integer number (22424256).

Almost surely, 2^161018099 is an apocalyptic number.

161018099 is a deficient number, since it is larger than the sum of its proper divisors (18375949).

161018099 is a wasteful number, since it uses less digits than its factorization.

161018099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311505.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 161018099 is about 12689.2907209190. The cubic root of 161018099 is about 544.0325670292.

The spelling of 161018099 in words is "one hundred sixty-one million, eighteen thousand, ninety-nine".