161582118 has 32 divisors (see below), whose sum is σ = 340794240. Its totient is φ = 50932800.

The previous prime is 161582117. The next prime is 161582131. The reversal of 161582118 is 811285161.

It is a super-2 number, since 2×161582118² = 52217561714731848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161582117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88818 + ... + 90618.

It is an arithmetic number, because the mean of its divisors is an integer number (10649820).

Almost surely, 2^161582118 is an apocalyptic number.

161582118 is an abundant number, since it is smaller than the sum of its proper divisors (179212122).

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

161582118 is a wasteful number, since it uses less digits than its factorization.

161582118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2612.

The product of its digits is 3840, while the sum is 33.

The square root of 161582118 is about 12711.4955060370. The cubic root of 161582118 is about 544.6670446169.

The spelling of 161582118 in words is "one hundred sixty-one million, five hundred eighty-two thousand, one hundred eighteen".