18162635144 has 16 divisors (see below), whose sum is σ = 34062710220. Its totient is φ = 9079245760.

The previous prime is 18162635131. The next prime is 18162635159. The reversal of 18162635144 is 44153626181.

It can be written as a sum of positive squares in 2 ways, for example, as 17453052100 + 709583044 = 132110^2 + 26638^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221399 + ... + 292134.

Almost surely, 2^18162635144 is an apocalyptic number.

It is an amenable number.

18162635144 is a deficient number, since it is larger than the sum of its proper divisors (15900075076).

18162635144 is a wasteful number, since it uses less digits than its factorization.

18162635144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517960 (or 517956 counting only the distinct ones).

The product of its digits is 138240, while the sum is 41.

The spelling of 18162635144 in words is "eighteen billion, one hundred sixty-two million, six hundred thirty-five thousand, one hundred forty-four".