6465239819 has 2 divisors, whose sum is σ = 6465239820. Its totient is φ = 6465239818.

The previous prime is 6465239777. The next prime is 6465239827. The reversal of 6465239819 is 9189325646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6465239819 - 2¹² = 6465235723 is a prime.

It is a super-2 number, since 2×6465239819² = 83598651834366305522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6465239899) 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, 3232619909 + 3232619910.

It is an arithmetic number, because the mean of its divisors is an integer number (3232619910).

Almost surely, 2^6465239819 is an apocalyptic number.

6465239819 is a deficient number, since it is larger than the sum of its proper divisors (1).

6465239819 is an equidigital number, since it uses as much as digits as its factorization.

6465239819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 53.

The square root of 6465239819 is about 80406.7150118695. The cubic root of 6465239819 is about 1862.9228930506.

The spelling of 6465239819 in words is "six billion, four hundred sixty-five million, two hundred thirty-nine thousand, eight hundred nineteen".