64189441 has 8 divisors (see below), whose sum is σ = 66493800. Its totient is φ = 61891200.

The previous prime is 64189427. The next prime is 64189453. The reversal of 64189441 is 14498146.

It can be written as a sum of positive squares in 4 ways, for example, as 16524225 + 47665216 = 4065^2 + 6904^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64189441 - 2⁵ = 64189409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64189441.

It is not an unprimeable number, because it can be changed into a prime (64189421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34741 + ... + 36541.

It is an arithmetic number, because the mean of its divisors is an integer number (8311725).

Almost surely, 2^64189441 is an apocalyptic number.

It is an amenable number.

64189441 is a deficient number, since it is larger than the sum of its proper divisors (2304359).

64189441 is a wasteful number, since it uses less digits than its factorization.

64189441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3059.

The product of its digits is 27648, while the sum is 37.

The square root of 64189441 is about 8011.8313137509. The cubic root of 64189441 is about 400.3942799805.

The spelling of 64189441 in words is "sixty-four million, one hundred eighty-nine thousand, four hundred forty-one".