18115616416 has 24 divisors (see below), whose sum is σ = 35681161824. Its totient is φ = 9053734080.

The previous prime is 18115616411. The next prime is 18115616447. The reversal of 18115616416 is 61461651181.

It is not an unprimeable number, because it can be changed into a prime (18115616411) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 54420 + ... + 197971.

It is an arithmetic number, because the mean of its divisors is an integer number (1486715076).

Almost surely, 2^18115616416 is an apocalyptic number.

18115616416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18115616416 is a deficient number, since it is larger than the sum of its proper divisors (17565545408).

18115616416 is a wasteful number, since it uses less digits than its factorization.

18115616416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254644 (or 254636 counting only the distinct ones).

The product of its digits is 34560, while the sum is 40.

The spelling of 18115616416 in words is "eighteen billion, one hundred fifteen million, six hundred sixteen thousand, four hundred sixteen".