65456591 has 2 divisors, whose sum is σ = 65456592. Its totient is φ = 65456590.

The previous prime is 65456581. The next prime is 65456609. The reversal of 65456591 is 19565456.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65456591 - 2¹⁰ = 65455567 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65456581) 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, 32728295 + 32728296.

It is an arithmetic number, because the mean of its divisors is an integer number (32728296).

Almost surely, 2^65456591 is an apocalyptic number.

65456591 is a deficient number, since it is larger than the sum of its proper divisors (1).

65456591 is an equidigital number, since it uses as much as digits as its factorization.

65456591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162000, while the sum is 41.

The square root of 65456591 is about 8090.5247666638. The cubic root of 65456591 is about 403.0118298674.

The spelling of 65456591 in words is "sixty-five million, four hundred fifty-six thousand, five hundred ninety-one".