64552320 has 192 divisors, whose sum is σ = 254910240. Its totient is φ = 14745600.

The previous prime is 64552303. The next prime is 64552333. The reversal of 64552320 is 2325546.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39520 + ... + 41120.

Almost surely, 2^64552320 is an apocalyptic number.

64552320 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 64552320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127455120).

64552320 is an abundant number, since it is smaller than the sum of its proper divisors (190357920).

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

64552320 is a wasteful number, since it uses less digits than its factorization.

64552320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633 (or 1618 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 64552320 is about 8034.4458427448. The cubic root of 64552320 is about 401.1473723615.

Adding to 64552320 its reverse (2325546), we get a palindrome (66877866).

The spelling of 64552320 in words is "sixty-four million, five hundred fifty-two thousand, three hundred twenty".