64533545 has 4 divisors (see below), whose sum is σ = 77440260. Its totient is φ = 51626832.

The previous prime is 64533527. The next prime is 64533569. The reversal of 64533545 is 54533546.

64533545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29333056 + 35200489 = 5416^2 + 5933^2 .

It is a cyclic number.

It is not a de Polignac number, because 64533545 - 2¹⁰ = 64532521 is a prime.

It is an unprimeable number.

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, 6453350 + ... + 6453359.

It is an arithmetic number, because the mean of its divisors is an integer number (19360065).

Almost surely, 2^64533545 is an apocalyptic number.

It is an amenable number.

64533545 is a deficient number, since it is larger than the sum of its proper divisors (12906715).

64533545 is a wasteful number, since it uses less digits than its factorization.

64533545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12906714.

The product of its digits is 108000, while the sum is 35.

The square root of 64533545 is about 8033.2773511189. The cubic root of 64533545 is about 401.1084774402.

Subtracting from 64533545 its reverse (54533546), we obtain a palindrome (9999999).

The spelling of 64533545 in words is "sixty-four million, five hundred thirty-three thousand, five hundred forty-five".