6406302509 has 2 divisors, whose sum is σ = 6406302510. Its totient is φ = 6406302508.

The previous prime is 6406302499. The next prime is 6406302517. The reversal of 6406302509 is 9052036046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6217322500 + 188980009 = 78850^2 + 13747^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6406302509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6406302569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3203151254 + 3203151255.

It is an arithmetic number, because the mean of its divisors is an integer number (3203151255).

Almost surely, 2^6406302509 is an apocalyptic number.

It is an amenable number.

6406302509 is a deficient number, since it is larger than the sum of its proper divisors (1).

6406302509 is an equidigital number, since it uses as much as digits as its factorization.

6406302509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 6406302509 is about 80039.3809883610. The cubic root of 6406302509 is about 1857.2447846528.

The spelling of 6406302509 in words is "six billion, four hundred six million, three hundred two thousand, five hundred nine".