18155055016 has 32 divisors (see below), whose sum is σ = 40158650880. Its totient is φ = 7529745600.

The previous prime is 18155055011. The next prime is 18155055041. The reversal of 18155055016 is 61055055181.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18155055011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5227255 + ... + 5230726.

It is an arithmetic number, because the mean of its divisors is an integer number (1254957840).

Almost surely, 2^18155055016 is an apocalyptic number.

It is an amenable number.

18155055016 is an abundant number, since it is smaller than the sum of its proper divisors (22003595864).

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

18155055016 is a wasteful number, since it uses less digits than its factorization.

18155055016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10458025 (or 10458021 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 37.

The spelling of 18155055016 in words is "eighteen billion, one hundred fifty-five million, fifty-five thousand, sixteen".