64855716 has 48 divisors (see below), whose sum is σ = 157429440. Its totient is φ = 20755840.

The previous prime is 64855711. The next prime is 64855771. The reversal of 64855716 is 61755846.

It is not an unprimeable number, because it can be changed into a prime (64855711) 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, 78586 + ... + 79406.

It is an arithmetic number, because the mean of its divisors is an integer number (3279780).

Almost surely, 2^64855716 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 64855716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78714720).

64855716 is an abundant number, since it is smaller than the sum of its proper divisors (92573724).

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

64855716 is a wasteful number, since it uses less digits than its factorization.

64855716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084 (or 1082 counting only the distinct ones).

The product of its digits is 201600, while the sum is 42.

The square root of 64855716 is about 8053.3046633044. The cubic root of 64855716 is about 401.7748547454.

The spelling of 64855716 in words is "sixty-four million, eight hundred fifty-five thousand, seven hundred sixteen".