180161100 has 108 divisors (see below), whose sum is σ = 645399664. Its totient is φ = 41178240.

The previous prime is 180161089. The next prime is 180161101. The reversal of 180161100 is 1161081.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (180161101) 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 35 ways as a sum of consecutive naturals, for example, 7999 + ... + 20598.

Almost surely, 2^180161100 is an apocalyptic number.

180161100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

180161100 is an abundant number, since it is smaller than the sum of its proper divisors (465238564).

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

180161100 is a wasteful number, since it uses less digits than its factorization.

180161100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28624 (or 28614 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

The square root of 180161100 is about 13422.4103647594. The cubic root of 180161100 is about 564.7900125499.

The spelling of 180161100 in words is "one hundred eighty million, one hundred sixty-one thousand, one hundred".