6463299809 has 4 divisors (see below), whose sum is σ = 6585248916. Its totient is φ = 6341350704.

The previous prime is 6463299793. The next prime is 6463299907. The reversal of 6463299809 is 9089923646.

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 3728323600 + 2734976209 = 61060^2 + 52297^2 .

It is a cyclic number.

It is not a de Polignac number, because 6463299809 - 2⁴ = 6463299793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6463299509) 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, 60974474 + ... + 60974579.

It is an arithmetic number, because the mean of its divisors is an integer number (1646312229).

Almost surely, 2^6463299809 is an apocalyptic number.

It is an amenable number.

6463299809 is a deficient number, since it is larger than the sum of its proper divisors (121949107).

6463299809 is a wasteful number, since it uses less digits than its factorization.

6463299809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121949106.

The product of its (nonzero) digits is 5038848, while the sum is 56.

The square root of 6463299809 is about 80394.6503755070. The cubic root of 6463299809 is about 1862.7365400463.

The spelling of 6463299809 in words is "six billion, four hundred sixty-three million, two hundred ninety-nine thousand, eight hundred nine".