6598639009 has 2 divisors, whose sum is σ = 6598639010. Its totient is φ = 6598639008.

The previous prime is 6598638973. The next prime is 6598639039. The reversal of 6598639009 is 9009368956.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6213380625 + 385258384 = 78825^2 + 19628^2 .

It is a cyclic number.

It is not a de Polignac number, because 6598639009 - 2³¹ = 4451155361 is a prime.

It is not a weakly prime, because it can be changed into another prime (6598639039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3299319504 + 3299319505.

It is an arithmetic number, because the mean of its divisors is an integer number (3299319505).

Almost surely, 2^6598639009 is an apocalyptic number.

It is an amenable number.

6598639009 is a deficient number, since it is larger than the sum of its proper divisors (1).

6598639009 is an equidigital number, since it uses as much as digits as its factorization.

6598639009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3149280, while the sum is 55.

The square root of 6598639009 is about 81232.0072939232. The cubic root of 6598639009 is about 1875.6485113399.

The spelling of 6598639009 in words is "six billion, five hundred ninety-eight million, six hundred thirty-nine thousand, nine".