648045762709 has 2 divisors, whose sum is σ = 648045762710. Its totient is φ = 648045762708.

The previous prime is 648045762667. The next prime is 648045762731. The reversal of 648045762709 is 907267540846.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 480782758225 + 167263004484 = 693385^2 + 408978^2 .

It is a cyclic number.

It is not a de Polignac number, because 648045762709 - 2³³ = 639455828117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648045762109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324022881354 + 324022881355.

It is an arithmetic number, because the mean of its divisors is an integer number (324022881355).

Almost surely, 2^648045762709 is an apocalyptic number.

It is an amenable number.

648045762709 is a deficient number, since it is larger than the sum of its proper divisors (1).

648045762709 is an equidigital number, since it uses as much as digits as its factorization.

648045762709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20321280, while the sum is 58.

The spelling of 648045762709 in words is "six hundred forty-eight billion, forty-five million, seven hundred sixty-two thousand, seven hundred nine".