64415568 has 80 divisors (see below), whose sum is σ = 194273280. Its totient is φ = 18008448.

The previous prime is 64415509. The next prime is 64415623. The reversal of 64415568 is 86551446.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13753 + ... + 17831.

It is an arithmetic number, because the mean of its divisors is an integer number (2428416).

Almost surely, 2^64415568 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 64415568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97136640).

64415568 is an abundant number, since it is smaller than the sum of its proper divisors (129857712).

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

64415568 is a wasteful number, since it uses less digits than its factorization.

64415568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4144 (or 4138 counting only the distinct ones).

The product of its digits is 115200, while the sum is 39.

The square root of 64415568 is about 8025.9309740366. The cubic root of 64415568 is about 400.8638995175.

The spelling of 64415568 in words is "sixty-four million, four hundred fifteen thousand, five hundred sixty-eight".