648663434563 has 2 divisors, whose sum is σ = 648663434564. Its totient is φ = 648663434562.

The previous prime is 648663434521. The next prime is 648663434569. The reversal of 648663434563 is 365434366846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648663434563 - 2²¹ = 648661337411 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 648663434498 and 648663434507.

It is not a weakly prime, because it can be changed into another prime (648663434569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324331717281 + 324331717282.

It is an arithmetic number, because the mean of its divisors is an integer number (324331717282).

Almost surely, 2^648663434563 is an apocalyptic number.

648663434563 is a deficient number, since it is larger than the sum of its proper divisors (1).

648663434563 is an equidigital number, since it uses as much as digits as its factorization.

648663434563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 89579520, while the sum is 58.

The spelling of 648663434563 in words is "six hundred forty-eight billion, six hundred sixty-three million, four hundred thirty-four thousand, five hundred sixty-three".