32020640664 has 64 divisors (see below), whose sum is σ = 83881958400. Its totient is φ = 10166720256.

The previous prime is 32020640653. The next prime is 32020640671. The reversal of 32020640664 is 46604602023.

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 15 ways as a sum of consecutive naturals, for example, 10572 + ... + 253284.

It is an arithmetic number, because the mean of its divisors is an integer number (1310655600).

Almost surely, 2^32020640664 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 32020640664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41940979200).

32020640664 is an abundant number, since it is smaller than the sum of its proper divisors (51861317736).

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

32020640664 is a wasteful number, since it uses less digits than its factorization.

32020640664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242984 (or 242980 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 33.

The spelling of 32020640664 in words is "thirty-two billion, twenty million, six hundred forty thousand, six hundred sixty-four".