18162978136 has 8 divisors (see below), whose sum is σ = 34055584020. Its totient is φ = 9081489064.

The previous prime is 18162978049. The next prime is 18162978157. The reversal of 18162978136 is 63187926181.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×18162978136³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1135186126 + ... + 1135186141.

Almost surely, 2^18162978136 is an apocalyptic number.

It is an amenable number.

18162978136 is a deficient number, since it is larger than the sum of its proper divisors (15892605884).

18162978136 is a wasteful number, since it uses less digits than its factorization.

18162978136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270372273 (or 2270372269 counting only the distinct ones).

The product of its digits is 870912, while the sum is 52.

The spelling of 18162978136 in words is "eighteen billion, one hundred sixty-two million, nine hundred seventy-eight thousand, one hundred thirty-six".