220287643489 has 4 divisors (see below), whose sum is σ = 220289790100. Its totient is φ = 220285496880.

The previous prime is 220287643483. The next prime is 220287643529. The reversal of 220287643489 is 984346782022.

220287643489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 98370049600 + 121917593889 = 313640^2 + 349167^2 .

It is a cyclic number.

It is not a de Polignac number, because 220287643489 - 2⁹ = 220287642977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220287643483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 911214 + ... + 1127335.

It is an arithmetic number, because the mean of its divisors is an integer number (55072447525).

Almost surely, 2^220287643489 is an apocalyptic number.

It is an amenable number.

220287643489 is a deficient number, since it is larger than the sum of its proper divisors (2146611).

220287643489 is a wasteful number, since it uses less digits than its factorization.

220287643489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2146610.

The product of its (nonzero) digits is 9289728, while the sum is 55.

The spelling of 220287643489 in words is "two hundred twenty billion, two hundred eighty-seven million, six hundred forty-three thousand, four hundred eighty-nine".