32220466640 has 120 divisors (see below), whose sum is σ = 77160847104. Its totient is φ = 12512281600.

The previous prime is 32220466613. The next prime is 32220466679. The reversal of 32220466640 is 4666402223.

It is a self number, because there is not a number n which added to its sum of digits gives 32220466640.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35367785 + ... + 35368695.

Almost surely, 2^32220466640 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 32220466640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38580423552).

32220466640 is an abundant number, since it is smaller than the sum of its proper divisors (44940380464).

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

32220466640 is a wasteful number, since it uses less digits than its factorization.

32220466640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269 (or 1222 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 32220466640 its reverse (4666402223), we get a palindrome (36886868863).

The spelling of 32220466640 in words is "thirty-two billion, two hundred twenty million, four hundred sixty-six thousand, six hundred forty".