648802819741 has 2 divisors, whose sum is σ = 648802819742. Its totient is φ = 648802819740.

The previous prime is 648802819673. The next prime is 648802819781. The reversal of 648802819741 is 147918208846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504638323641 + 144164496100 = 710379^2 + 379690^2 .

It is a cyclic number.

It is not a de Polignac number, because 648802819741 - 2⁹ = 648802819229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648802819781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324401409870 + 324401409871.

It is an arithmetic number, because the mean of its divisors is an integer number (324401409871).

Almost surely, 2^648802819741 is an apocalyptic number.

It is an amenable number.

648802819741 is a deficient number, since it is larger than the sum of its proper divisors (1).

648802819741 is an equidigital number, since it uses as much as digits as its factorization.

648802819741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6193152, while the sum is 58.

The spelling of 648802819741 in words is "six hundred forty-eight billion, eight hundred two million, eight hundred nineteen thousand, seven hundred forty-one".