64044643 has 4 divisors (see below), whose sum is σ = 68971168. Its totient is φ = 59118120.

The previous prime is 64044637. The next prime is 64044653. The reversal of 64044643 is 34644046.

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

It is a cyclic number.

It is not a de Polignac number, because 64044643 - 2⁹ = 64044131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64044613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2463243 + ... + 2463268.

It is an arithmetic number, because the mean of its divisors is an integer number (17242792).

Almost surely, 2^64044643 is an apocalyptic number.

64044643 is a deficient number, since it is larger than the sum of its proper divisors (4926525).

64044643 is a wasteful number, since it uses less digits than its factorization.

64044643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4926524.

The product of its (nonzero) digits is 27648, while the sum is 31.

The square root of 64044643 is about 8002.7897010980. The cubic root of 64044643 is about 400.0929846330.

Adding to 64044643 its reverse (34644046), we get a palindrome (98688689).

The spelling of 64044643 in words is "sixty-four million, forty-four thousand, six hundred forty-three".