18015334656 has 144 divisors (see below), whose sum is σ = 55383144768. Its totient is φ = 5138022400.

The previous prime is 18015334651. The next prime is 18015334661. The reversal of 18015334656 is 65643351081.

It is an interprime number because it is at equal distance from previous prime (18015334651) and next prime (18015334661).

It is not an unprimeable number, because it can be changed into a prime (18015334651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80896 + ... + 206336.

It is an arithmetic number, because the mean of its divisors is an integer number (384605172).

Almost surely, 2^18015334656 is an apocalyptic number.

18015334656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18015334656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27691572384).

18015334656 is an abundant number, since it is smaller than the sum of its proper divisors (37367810112).

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

18015334656 is a wasteful number, since it uses less digits than its factorization.

18015334656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125488 (or 125474 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 18015334656 in words is "eighteen billion, fifteen million, three hundred thirty-four thousand, six hundred fifty-six".