161155018 has 16 divisors (see below), whose sum is σ = 244664064. Its totient is φ = 79606240.

The previous prime is 161154971. The next prime is 161155031. The reversal of 161155018 is 810551161.

161155018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60903 + ... + 63493.

It is an arithmetic number, because the mean of its divisors is an integer number (15291504).

Almost surely, 2^161155018 is an apocalyptic number.

161155018 is a deficient number, since it is larger than the sum of its proper divisors (83509046).

161155018 is a wasteful number, since it uses less digits than its factorization.

161155018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2957.

The product of its (nonzero) digits is 1200, while the sum is 28.

The square root of 161155018 is about 12694.6846357048. The cubic root of 161155018 is about 544.1867262866.

The spelling of 161155018 in words is "one hundred sixty-one million, one hundred fifty-five thousand, eighteen".