64845389 has 16 divisors (see below), whose sum is σ = 75856512. Its totient is φ = 54286848.

The previous prime is 64845353. The next prime is 64845413. The reversal of 64845389 is 98354846.

It is not a de Polignac number, because 64845389 - 2¹⁶ = 64779853 is a prime.

It is a super-2 number, since 2×64845389² = 8409848949122642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64845589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57182 + ... + 58304.

It is an arithmetic number, because the mean of its divisors is an integer number (4741032).

Almost surely, 2^64845389 is an apocalyptic number.

It is an amenable number.

64845389 is a deficient number, since it is larger than the sum of its proper divisors (11011123).

64845389 is a wasteful number, since it uses less digits than its factorization.

64845389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316.

The product of its digits is 829440, while the sum is 47.

The square root of 64845389 is about 8052.6634724171. The cubic root of 64845389 is about 401.7535286931.

The spelling of 64845389 in words is "sixty-four million, eight hundred forty-five thousand, three hundred eighty-nine".