64322560 has 88 divisors (see below), whose sum is σ = 163596240. Its totient is φ = 24182784.

The previous prime is 64322507. The next prime is 64322561. The reversal of 64322560 is 6522346.

It is a happy number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64322561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86671 + ... + 87409.

Almost surely, 2^64322560 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 64322560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81798120).

64322560 is an abundant number, since it is smaller than the sum of its proper divisors (99273680).

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

64322560 is a wasteful number, since it uses less digits than its factorization.

64322560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781 (or 763 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 64322560 is about 8020.1346622111. The cubic root of 64322560 is about 400.6708741905.

It can be divided in two parts, 64 and 322560, that added together give a square (322624 = 568²).

The spelling of 64322560 in words is "sixty-four million, three hundred twenty-two thousand, five hundred sixty".