6464485189 has 4 divisors (see below), whose sum is σ = 6470970124. Its totient is φ = 6458000256.

The previous prime is 6464485123. The next prime is 6464485193. The reversal of 6464485189 is 9815844646.

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 3641156964 + 2823328225 = 60342^2 + 53135^2 .

It is a cyclic number.

It is not a de Polignac number, because 6464485189 - 2³¹ = 4317001541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6464485789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3240972 + ... + 3242965.

It is an arithmetic number, because the mean of its divisors is an integer number (1617742531).

Almost surely, 2^6464485189 is an apocalyptic number.

It is an amenable number.

6464485189 is a deficient number, since it is larger than the sum of its proper divisors (6484935).

6464485189 is an equidigital number, since it uses as much as digits as its factorization.

6464485189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6484934.

The product of its digits is 6635520, while the sum is 55.

The square root of 6464485189 is about 80402.0222942184. The cubic root of 6464485189 is about 1862.8504094180.

The spelling of 6464485189 in words is "six billion, four hundred sixty-four million, four hundred eighty-five thousand, one hundred eighty-nine".