64905216 has 112 divisors (see below), whose sum is σ = 183489600. Its totient is φ = 20348928.

The previous prime is 64905209. The next prime is 64905223. The reversal of 64905216 is 61250946.

It is an interprime number because it is at equal distance from previous prime (64905209) and next prime (64905223).

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, 466875 + ... + 467013.

It is an arithmetic number, because the mean of its divisors is an integer number (1638300).

Almost surely, 2^64905216 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 64905216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91744800).

64905216 is an abundant number, since it is smaller than the sum of its proper divisors (118584384).

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

64905216 is a wasteful number, since it uses less digits than its factorization.

64905216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 64905216 is about 8056.3773496529. The cubic root of 64905216 is about 401.8770446473.

The spelling of 64905216 in words is "sixty-four million, nine hundred five thousand, two hundred sixteen".