65244168 has 72 divisors (see below), whose sum is σ = 194253150. Its totient is φ = 19768320.

The previous prime is 65244167. The next prime is 65244199. The reversal of 65244168 is 86144256.

It can be written as a sum of positive squares in only one way, i.e., 55621764 + 9622404 = 7458^2 + 3102^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65244163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4968 + ... + 12456.

Almost surely, 2^65244168 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 65244168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97126575).

65244168 is an abundant number, since it is smaller than the sum of its proper divisors (129008982).

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

65244168 is a wasteful number, since it uses less digits than its factorization.

65244168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7523 (or 7505 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 65244168 is about 8077.3862108977. The cubic root of 65244168 is about 402.5753993747.

The spelling of 65244168 in words is "sixty-five million, two hundred forty-four thousand, one hundred sixty-eight".