64552423320 has 384 divisors, whose sum is σ = 264723863040. Its totient is φ = 13251409920.

The previous prime is 64552423289. The next prime is 64552423379. The reversal of 64552423320 is 2332425546.

64552423320 is a `hidden beast` number, since 64 + 552 + 4 + 23 + 3 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2286732 + ... + 2314788.

It is an arithmetic number, because the mean of its divisors is an integer number (689385060).

Almost surely, 2^64552423320 is an apocalyptic number.

64552423320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64552423320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132361931520).

64552423320 is an abundant number, since it is smaller than the sum of its proper divisors (200171439720).

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

64552423320 is a wasteful number, since it uses less digits than its factorization.

64552423320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28175 (or 28168 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 36.

Adding to 64552423320 its reverse (2332425546), we get a palindrome (66884848866).

The spelling of 64552423320 in words is "sixty-four billion, five hundred fifty-two million, four hundred twenty-three thousand, three hundred twenty".