64415616 has 64 divisors (see below), whose sum is σ = 172012800. Its totient is φ = 21358080.

The previous prime is 64415509. The next prime is 64415623. The reversal of 64415616 is 61651446.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103755 + ... + 104373.

It is an arithmetic number, because the mean of its divisors is an integer number (2687700).

Almost surely, 2^64415616 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 64415616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86006400).

64415616 is an abundant number, since it is smaller than the sum of its proper divisors (107597184).

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

64415616 is a wasteful number, since it uses less digits than its factorization.

64415616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907 (or 895 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 64415616 is about 8025.9339643433. The cubic root of 64415616 is about 400.8639990869.

The spelling of 64415616 in words is "sixty-four million, four hundred fifteen thousand, six hundred sixteen".