181664103 has 16 divisors (see below), whose sum is σ = 244500480. Its totient is φ = 119974176.

The previous prime is 181664099. The next prime is 181664129. The reversal of 181664103 is 301466181.

It is not a de Polignac number, because 181664103 - 2² = 181664099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181664183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239601 + ... + 240357.

It is an arithmetic number, because the mean of its divisors is an integer number (15281280).

Almost surely, 2^181664103 is an apocalyptic number.

181664103 is a deficient number, since it is larger than the sum of its proper divisors (62836377).

181664103 is a wasteful number, since it uses less digits than its factorization.

181664103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 181664103 is about 13478.2826428295. The cubic root of 181664103 is about 566.3562614101.

The spelling of 181664103 in words is "one hundred eighty-one million, six hundred sixty-four thousand, one hundred three".