216605064 has 64 divisors (see below), whose sum is σ = 594216000. Its totient is φ = 65385216.

The previous prime is 216605063. The next prime is 216605069. The reversal of 216605064 is 460506612.

It is not an unprimeable number, because it can be changed into a prime (216605063) 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, 9987 + ... + 23085.

It is an arithmetic number, because the mean of its divisors is an integer number (9284625).

Almost surely, 2^216605064 is an apocalyptic number.

216605064 is a gapful number since it is divisible by the number (24) 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 216605064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297108000).

216605064 is an abundant number, since it is smaller than the sum of its proper divisors (377610936).

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

216605064 is a wasteful number, since it uses less digits than its factorization.

216605064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13174 (or 13170 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 216605064 is about 14717.5087565797. The cubic root of 216605064 is about 600.5597221340.

The spelling of 216605064 in words is "two hundred sixteen million, six hundred five thousand, sixty-four".