220959997544 has 64 divisors (see below), whose sum is σ = 486968328000. Its totient is φ = 92665105920.

The previous prime is 220959997529. The next prime is 220959997607. The reversal of 220959997544 is 445799959022.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2343587 + ... + 2436045.

It is an arithmetic number, because the mean of its divisors is an integer number (7608880125).

Almost surely, 2^220959997544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220959997544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243484164000).

220959997544 is an abundant number, since it is smaller than the sum of its proper divisors (266008330456).

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

220959997544 is a wasteful number, since it uses less digits than its factorization.

220959997544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94578 (or 94574 counting only the distinct ones).

The product of its (nonzero) digits is 73483200, while the sum is 65.

The spelling of 220959997544 in words is "two hundred twenty billion, nine hundred fifty-nine million, nine hundred ninety-seven thousand, five hundred forty-four".