64489365 has 20 divisors (see below), whose sum is σ = 115603884. Its totient is φ = 34394112.

The previous prime is 64489361. The next prime is 64489367. The reversal of 64489365 is 56398446.

64489365 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 34644996 + 29844369 = 5886^2 + 5463^2 .

It is not a de Polignac number, because 64489365 - 2² = 64489361 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 64489365.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64489361) 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 19 ways as a sum of consecutive naturals, for example, 79212 + ... + 80021.

Almost surely, 2^64489365 is an apocalyptic number.

It is an amenable number.

64489365 is a deficient number, since it is larger than the sum of its proper divisors (51114519).

64489365 is a wasteful number, since it uses less digits than its factorization.

64489365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159250 (or 159241 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 64489365 is about 8030.5270686301. The cubic root of 64489365 is about 401.0169228953.

It can be divided in two parts, 644 and 89365, that added together give a palindrome (90009).

The spelling of 64489365 in words is "sixty-four million, four hundred eighty-nine thousand, three hundred sixty-five".