648755567 has 2 divisors, whose sum is σ = 648755568. Its totient is φ = 648755566.

The previous prime is 648755533. The next prime is 648755579. The reversal of 648755567 is 765557846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648755567 - 2¹⁰ = 648754543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648755467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324377783 + 324377784.

It is an arithmetic number, because the mean of its divisors is an integer number (324377784).

Almost surely, 2^648755567 is an apocalyptic number.

648755567 is a deficient number, since it is larger than the sum of its proper divisors (1).

648755567 is an equidigital number, since it uses as much as digits as its factorization.

648755567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056000, while the sum is 53.

The square root of 648755567 is about 25470.6805366484. The cubic root of 648755567 is about 865.6859437028.

The spelling of 648755567 in words is "six hundred forty-eight million, seven hundred fifty-five thousand, five hundred sixty-seven".