221563065264 has 80 divisors (see below), whose sum is σ = 579291672960. Its totient is φ = 72964085760.

The previous prime is 221563065257. The next prime is 221563065349. The reversal of 221563065264 is 462560365122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2616907 + ... + 2700245.

It is an arithmetic number, because the mean of its divisors is an integer number (7241145912).

Almost surely, 2^221563065264 is an apocalyptic number.

221563065264 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 221563065264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289645836480).

221563065264 is an abundant number, since it is smaller than the sum of its proper divisors (357728607696).

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

221563065264 is a wasteful number, since it uses less digits than its factorization.

221563065264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84018 (or 84012 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 221563065264 in words is "two hundred twenty-one billion, five hundred sixty-three million, sixty-five thousand, two hundred sixty-four".