64622560 has 48 divisors (see below), whose sum is σ = 156410352. Its totient is φ = 25216000.

The previous prime is 64622533. The next prime is 64622563. The reversal of 64622560 is 6522646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64622563) 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, 1635 + ... + 11485.

It is an arithmetic number, because the mean of its divisors is an integer number (3258549).

Almost surely, 2^64622560 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 64622560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78205176).

64622560 is an abundant number, since it is smaller than the sum of its proper divisors (91787792).

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

64622560 is a wasteful number, since it uses less digits than its factorization.

64622560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9907 (or 9899 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 64622560 is about 8038.8158331933. The cubic root of 64622560 is about 401.2928170585.

The spelling of 64622560 in words is "sixty-four million, six hundred twenty-two thousand, five hundred sixty".