64740216 has 64 divisors (see below), whose sum is σ = 178848000. Its totient is φ = 19424768.

The previous prime is 64740211. The next prime is 64740217. The reversal of 64740216 is 61204746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64740211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5935 + ... + 12833.

It is an arithmetic number, because the mean of its divisors is an integer number (2794500).

Almost surely, 2^64740216 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 64740216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89424000).

64740216 is an abundant number, since it is smaller than the sum of its proper divisors (114107784).

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

64740216 is a wasteful number, since it uses less digits than its factorization.

64740216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6948 (or 6944 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 64740216 is about 8046.1304985689. The cubic root of 64740216 is about 401.5362092666.

The spelling of 64740216 in words is "sixty-four million, seven hundred forty thousand, two hundred sixteen".