220449998561 has 8 divisors (see below), whose sum is σ = 237420543360. Its totient is φ = 203481289872.

The previous prime is 220449998551. The next prime is 220449998611. The reversal of 220449998561 is 165899944022.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220449998561 - 2¹⁴ = 220449982177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220449998561.

It is not an unprimeable number, because it can be changed into a prime (220449998551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204425 + ... + 694758.

It is an arithmetic number, because the mean of its divisors is an integer number (29677567920).

Almost surely, 2^220449998561 is an apocalyptic number.

It is an amenable number.

220449998561 is a deficient number, since it is larger than the sum of its proper divisors (16970544799).

220449998561 is a wasteful number, since it uses less digits than its factorization.

220449998561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918055.

The product of its (nonzero) digits is 11197440, while the sum is 59.

The spelling of 220449998561 in words is "two hundred twenty billion, four hundred forty-nine million, nine hundred ninety-eight thousand, five hundred sixty-one".