181168449 has 32 divisors (see below), whose sum is σ = 302125056. Its totient is φ = 93813120.

The previous prime is 181168397. The next prime is 181168483. The reversal of 181168449 is 944861181.

It is a happy number.

It is not a de Polignac number, because 181168449 - 2⁸ = 181168193 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 181168449.

It is not an unprimeable number, because it can be changed into a prime (181168049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83709 + ... + 85845.

It is an arithmetic number, because the mean of its divisors is an integer number (9441408).

Almost surely, 2^181168449 is an apocalyptic number.

It is an amenable number.

181168449 is a deficient number, since it is larger than the sum of its proper divisors (120956607).

181168449 is a wasteful number, since it uses less digits than its factorization.

181168449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525.

The product of its digits is 55296, while the sum is 42.

The square root of 181168449 is about 13459.8829489710. The cubic root of 181168449 is about 565.8407083779.

It can be divided in two parts, 18116 and 8449, that added together give a triangular number (26565 = T₂₃₀).

The spelling of 181168449 in words is "one hundred eighty-one million, one hundred sixty-eight thousand, four hundred forty-nine".