64589616 has 320 divisors, whose sum is σ = 239984640. Its totient is φ = 16174080.

The previous prime is 64589611. The next prime is 64589617. The reversal of 64589616 is 61698546.

64589616 is a `hidden beast` number, since 6 + 4 + 589 + 61 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (64589611) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1218646 + ... + 1218698.

It is an arithmetic number, because the mean of its divisors is an integer number (749952).

Almost surely, 2^64589616 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 64589616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119992320).

64589616 is an abundant number, since it is smaller than the sum of its proper divisors (175395024).

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

64589616 is a wasteful number, since it uses less digits than its factorization.

64589616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 109 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 64589616 is about 8036.7665139657. The cubic root of 64589616 is about 401.2246136441.

The spelling of 64589616 in words is "sixty-four million, five hundred eighty-nine thousand, six hundred sixteen".