181486372 has 6 divisors (see below), whose sum is σ = 317601158. Its totient is φ = 90743184.

The previous prime is 181486367. The next prime is 181486381. The reversal of 181486372 is 273684181.

It can be written as a sum of positive squares in only one way, i.e., 102738496 + 78747876 = 10136^2 + 8874^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 22685793 + ... + 22685800.

Almost surely, 2^181486372 is an apocalyptic number.

It is an amenable number.

181486372 is a deficient number, since it is larger than the sum of its proper divisors (136114786).

181486372 is a wasteful number, since it uses less digits than its factorization.

181486372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45371597 (or 45371595 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 181486372 is about 13471.6877932945. The cubic root of 181486372 is about 566.1715030062.

The spelling of 181486372 in words is "one hundred eighty-one million, four hundred eighty-six thousand, three hundred seventy-two".