217989064482 has 96 divisors (see below), whose sum is σ = 537746791680. Its totient is φ = 58536414720.

The previous prime is 217989064457. The next prime is 217989064487. The reversal of 217989064482 is 284460989712.

It is not an unprimeable number, because it can be changed into a prime (217989064487) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3563232 + ... + 3623892.

It is an arithmetic number, because the mean of its divisors is an integer number (5601529080).

Almost surely, 2^217989064482 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 217989064482, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268873395840).

217989064482 is an abundant number, since it is smaller than the sum of its proper divisors (319757727198).

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

217989064482 is a wasteful number, since it uses less digits than its factorization.

217989064482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61416 (or 61409 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 60.

The spelling of 217989064482 in words is "two hundred seventeen billion, nine hundred eighty-nine million, sixty-four thousand, four hundred eighty-two".