18064665216 has 384 divisors, whose sum is σ = 58383037440. Its totient is φ = 5323898880.

The previous prime is 18064665193. The next prime is 18064665257. The reversal of 18064665216 is 61256646081.

18064665216 is a `hidden beast` number, since 1 + 8 + 0 + 64 + 66 + 521 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77530636 + ... + 77530868.

It is an arithmetic number, because the mean of its divisors is an integer number (152039160).

Almost surely, 2^18064665216 is an apocalyptic number.

18064665216 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 18064665216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29191518720).

18064665216 is an abundant number, since it is smaller than the sum of its proper divisors (40318372224).

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

18064665216 is a wasteful number, since it uses less digits than its factorization.

18064665216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 18064665216 in words is "eighteen billion, sixty-four million, six hundred sixty-five thousand, two hundred sixteen".