650406145309 has 2 divisors, whose sum is σ = 650406145310. Its totient is φ = 650406145308.

The previous prime is 650406145303. The next prime is 650406145349. The reversal of 650406145309 is 903541604056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 534668064100 + 115738081209 = 731210^2 + 340203^2 .

It is a cyclic number.

It is not a de Polignac number, because 650406145309 - 2⁹ = 650406144797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650406145303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325203072654 + 325203072655.

It is an arithmetic number, because the mean of its divisors is an integer number (325203072655).

Almost surely, 2^650406145309 is an apocalyptic number.

It is an amenable number.

650406145309 is a deficient number, since it is larger than the sum of its proper divisors (1).

650406145309 is an equidigital number, since it uses as much as digits as its factorization.

650406145309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 650406145309 in words is "six hundred fifty billion, four hundred six million, one hundred forty-five thousand, three hundred nine".