6488622809 has 4 divisors (see below), whose sum is σ = 6490180404. Its totient is φ = 6487065216.

The previous prime is 6488622799. The next prime is 6488622817. The reversal of 6488622809 is 9082268846.

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 3994619209 + 2494003600 = 63203^2 + 49940^2 .

It is a cyclic number.

It is not a de Polignac number, because 6488622809 - 2⁴ = 6488622793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6488622859) 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, 772532 + ... + 780885.

It is an arithmetic number, because the mean of its divisors is an integer number (1622545101).

Almost surely, 2^6488622809 is an apocalyptic number.

It is an amenable number.

6488622809 is a deficient number, since it is larger than the sum of its proper divisors (1557595).

6488622809 is a wasteful number, since it uses less digits than its factorization.

6488622809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557594.

The product of its (nonzero) digits is 2654208, while the sum is 53.

The square root of 6488622809 is about 80551.9882374110. The cubic root of 6488622809 is about 1865.1660837222.

The spelling of 6488622809 in words is "six billion, four hundred eighty-eight million, six hundred twenty-two thousand, eight hundred nine".