181497364 has 12 divisors (see below), whose sum is σ = 317768724. Its totient is φ = 90706304.

The previous prime is 181497331. The next prime is 181497373. The reversal of 181497364 is 463794181.

It can be written as a sum of positive squares in 2 ways, for example, as 179828100 + 1669264 = 13410^2 + 1292^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 181497364.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 282 + ... + 19054.

It is an arithmetic number, because the mean of its divisors is an integer number (26480727).

Almost surely, 2^181497364 is an apocalyptic number.

It is an amenable number.

181497364 is a deficient number, since it is larger than the sum of its proper divisors (136271360).

181497364 is a wasteful number, since it uses less digits than its factorization.

181497364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21194 (or 21192 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 181497364 is about 13472.0957538165. The cubic root of 181497364 is about 566.1829331235.

The spelling of 181497364 in words is "one hundred eighty-one million, four hundred ninety-seven thousand, three hundred sixty-four".