65320144 has 20 divisors (see below), whose sum is σ = 126721924. Its totient is φ = 32617728.

The previous prime is 65320117. The next prime is 65320147. The reversal of 65320144 is 44102356.

65320144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 39187600 + 26132544 = 6260^2 + 5112^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65320147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12814 + ... + 17170.

Almost surely, 2^65320144 is an apocalyptic number.

It is an amenable number.

65320144 is a deficient number, since it is larger than the sum of its proper divisors (61401780).

65320144 is a wasteful number, since it uses less digits than its factorization.

65320144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5302 (or 5296 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 65320144 is about 8082.0878490647. The cubic root of 65320144 is about 402.7316033941.

The spelling of 65320144 in words is "sixty-five million, three hundred twenty thousand, one hundred forty-four".