648768119977 has 2 divisors, whose sum is σ = 648768119978. Its totient is φ = 648768119976.

The previous prime is 648768119963. The next prime is 648768120017. The reversal of 648768119977 is 779911867846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 520606983961 + 128161136016 = 721531^2 + 357996^2 .

It is a cyclic number.

It is not a de Polignac number, because 648768119977 - 2²⁷ = 648633902249 is a prime.

It is not a weakly prime, because it can be changed into another prime (648768119927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324384059988 + 324384059989.

It is an arithmetic number, because the mean of its divisors is an integer number (324384059989).

Almost surely, 2^648768119977 is an apocalyptic number.

It is an amenable number.

648768119977 is a deficient number, since it is larger than the sum of its proper divisors (1).

648768119977 is an equidigital number, since it uses as much as digits as its factorization.

648768119977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 256048128, while the sum is 73.

The spelling of 648768119977 in words is "six hundred forty-eight billion, seven hundred sixty-eight million, one hundred nineteen thousand, nine hundred seventy-seven".