181849873122 has 20 divisors (see below), whose sum is σ = 407478419766. Its totient is φ = 60616624320.

The previous prime is 181849873111. The next prime is 181849873159. The reversal of 181849873122 is 221378948181.

181849873122 is a `hidden beast` number, since 1 + 81 + 8 + 498 + 73 + 1 + 2 + 2 = 666.

181849873122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 181826340921 + 23532201 = 426411^2 + 4851^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 561264879 + ... + 561265202.

Almost surely, 2^181849873122 is an apocalyptic number.

181849873122 is an abundant number, since it is smaller than the sum of its proper divisors (225628546644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181849873122 is a wasteful number, since it uses less digits than its factorization.

181849873122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122530095 (or 1122530086 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 54.

The spelling of 181849873122 in words is "one hundred eighty-one billion, eight hundred forty-nine million, eight hundred seventy-three thousand, one hundred twenty-two".