181267030105 has 36 divisors (see below), whose sum is σ = 261811119780. Its totient is φ = 119987515200.

The previous prime is 181267030039. The next prime is 181267030117. The reversal of 181267030105 is 501030762181.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 80007516736 + 101259513369 = 282856^2 + 318213^2 .

It is not a de Polignac number, because 181267030105 - 2¹⁵ = 181266997337 is a prime.

It is a super-2 number, since 2×181267030105² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 35884830 + ... + 35889880.

It is an arithmetic number, because the mean of its divisors is an integer number (7272531105).

Almost surely, 2^181267030105 is an apocalyptic number.

It is an amenable number.

181267030105 is a deficient number, since it is larger than the sum of its proper divisors (80544089675).

181267030105 is an frugal number, since it uses more digits than its factorization.

181267030105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10150 (or 5092 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

Adding to 181267030105 its reverse (501030762181), we get a palindrome (682297792286).

The spelling of 181267030105 in words is "one hundred eighty-one billion, two hundred sixty-seven million, thirty thousand, one hundred five".