64144443 has 16 divisors (see below), whose sum is σ = 94582656. Its totient is φ = 38341440.

The previous prime is 64144441. The next prime is 64144499. The reversal of 64144443 is 34444146.

It is not a de Polignac number, because 64144443 - 2¹ = 64144441 is a prime.

It is a super-3 number, since 3×64144443³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 64144443.

It is not an unprimeable number, because it can be changed into a prime (64144441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10905 + ... + 15722.

It is an arithmetic number, because the mean of its divisors is an integer number (5911416).

Almost surely, 2^64144443 is an apocalyptic number.

64144443 is a deficient number, since it is larger than the sum of its proper divisors (30438213).

64144443 is a wasteful number, since it uses less digits than its factorization.

64144443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26714.

The product of its digits is 18432, while the sum is 30.

The square root of 64144443 is about 8009.0225995436. The cubic root of 64144443 is about 400.3006968136.

Adding to 64144443 its reverse (34444146), we get a palindrome (98588589).

The spelling of 64144443 in words is "sixty-four million, one hundred forty-four thousand, four hundred forty-three".