64675232189 has 4 divisors (see below), whose sum is σ = 65109294300. Its totient is φ = 64241170080.

The previous prime is 64675232179. The next prime is 64675232201. The reversal of 64675232189 is 98123257646.

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 9090096964 + 55585135225 = 95342^2 + 235765^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64675232189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64675232189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64675232129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217030832 + ... + 217031129.

It is an arithmetic number, because the mean of its divisors is an integer number (16277323575).

Almost surely, 2^64675232189 is an apocalyptic number.

It is an amenable number.

64675232189 is a deficient number, since it is larger than the sum of its proper divisors (434062111).

64675232189 is a wasteful number, since it uses less digits than its factorization.

64675232189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434062110.

The product of its digits is 4354560, while the sum is 53.

The spelling of 64675232189 in words is "sixty-four billion, six hundred seventy-five million, two hundred thirty-two thousand, one hundred eighty-nine".