64742216 has 64 divisors (see below), whose sum is σ = 152340480. Its totient is φ = 25058880.

The previous prime is 64742207. The next prime is 64742221. The reversal of 64742216 is 61224746.

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, 139601 + ... + 140063.

It is an arithmetic number, because the mean of its divisors is an integer number (2380320).

Almost surely, 2^64742216 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 64742216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76170240).

64742216 is an abundant number, since it is smaller than the sum of its proper divisors (87598264).

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

64742216 is a wasteful number, since it uses less digits than its factorization.

64742216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714 (or 710 counting only the distinct ones).

The product of its digits is 16128, while the sum is 32.

The square root of 64742216 is about 8046.2547809524. The cubic root of 64742216 is about 401.5403440697.

The spelling of 64742216 in words is "sixty-four million, seven hundred forty-two thousand, two hundred sixteen".