650221342949 has 2 divisors, whose sum is σ = 650221342950. Its totient is φ = 650221342948.

The previous prime is 650221342943. The next prime is 650221342963. The reversal of 650221342949 is 949243122056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 536200314049 + 114021028900 = 732257^2 + 337670^2 .

It is a cyclic number.

It is not a de Polignac number, because 650221342949 - 2¹⁶ = 650221277413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650221342943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325110671474 + 325110671475.

It is an arithmetic number, because the mean of its divisors is an integer number (325110671475).

Almost surely, 2^650221342949 is an apocalyptic number.

It is an amenable number.

650221342949 is a deficient number, since it is larger than the sum of its proper divisors (1).

650221342949 is an equidigital number, since it uses as much as digits as its factorization.

650221342949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 650221342949 in words is "six hundred fifty billion, two hundred twenty-one million, three hundred forty-two thousand, nine hundred forty-nine".