216304485264 has 400 divisors, whose sum is σ = 724189065600. Its totient is φ = 61054414848.

The previous prime is 216304485247. The next prime is 216304485283. The reversal of 216304485264 is 462584403612.

216304485264 is a `hidden beast` number, since 2 + 1 + 6 + 304 + 4 + 85 + 264 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 424959442 + ... + 424959950.

It is an arithmetic number, because the mean of its divisors is an integer number (1810472664).

Almost surely, 2^216304485264 is an apocalyptic number.

216304485264 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 216304485264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (362094532800).

216304485264 is an abundant number, since it is smaller than the sum of its proper divisors (507884580336).

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

216304485264 is a wasteful number, since it uses less digits than its factorization.

216304485264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012 (or 997 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 45.

Adding to 216304485264 its reverse (462584403612), we get a palindrome (678888888876).

The spelling of 216304485264 in words is "two hundred sixteen billion, three hundred four million, four hundred eighty-five thousand, two hundred sixty-four".