64534443 has 16 divisors (see below), whose sum is σ = 89717760. Its totient is φ = 41225184.

The previous prime is 64534441. The next prime is 64534453. The reversal of 64534443 is 34443546.

It is not a de Polignac number, because 64534443 - 2¹ = 64534441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64534441) 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, 2118 + ... + 11556.

It is an arithmetic number, because the mean of its divisors is an integer number (5607360).

Almost surely, 2^64534443 is an apocalyptic number.

64534443 is a deficient number, since it is larger than the sum of its proper divisors (25183317).

64534443 is a wasteful number, since it uses less digits than its factorization.

64534443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9538.

The product of its digits is 69120, while the sum is 33.

The square root of 64534443 is about 8033.3332434302. Note that the first 3 decimals coincide. The cubic root of 64534443 is about 401.1103379390.

Adding to 64534443 its reverse (34443546), we get a palindrome (98977989).

The spelling of 64534443 in words is "sixty-four million, five hundred thirty-four thousand, four hundred forty-three".