64465560560 has 120 divisors (see below), whose sum is σ = 158504564880. Its totient is φ = 24379905024.

The previous prime is 64465560559. The next prime is 64465560571. The reversal of 64465560560 is 6506556446.

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, 16430759 + ... + 16434681.

It is an arithmetic number, because the mean of its divisors is an integer number (1320871374).

Almost surely, 2^64465560560 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 64465560560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79252282440).

64465560560 is an abundant number, since it is smaller than the sum of its proper divisors (94039004320).

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

64465560560 is a wasteful number, since it uses less digits than its factorization.

64465560560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4543 (or 4518 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 47.

The spelling of 64465560560 in words is "sixty-four billion, four hundred sixty-five million, five hundred sixty thousand, five hundred sixty".