648475504769 has 2 divisors, whose sum is σ = 648475504770. Its totient is φ = 648475504768.

The previous prime is 648475504763. The next prime is 648475504823. The reversal of 648475504769 is 967405574846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 510917596225 + 137557908544 = 714785^2 + 370888^2 .

It is a cyclic number.

It is not a de Polignac number, because 648475504769 - 2⁸ = 648475504513 is a prime.

It is a super-2 number, since 2×648475504769² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (648475504763) 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, 324237752384 + 324237752385.

It is an arithmetic number, because the mean of its divisors is an integer number (324237752385).

Almost surely, 2^648475504769 is an apocalyptic number.

It is an amenable number.

648475504769 is a deficient number, since it is larger than the sum of its proper divisors (1).

648475504769 is an equidigital number, since it uses as much as digits as its factorization.

648475504769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 203212800, while the sum is 65.

The spelling of 648475504769 in words is "six hundred forty-eight billion, four hundred seventy-five million, five hundred four thousand, seven hundred sixty-nine".