680579954849 has 2 divisors, whose sum is σ = 680579954850. Its totient is φ = 680579954848.

The previous prime is 680579954839. The next prime is 680579954917. The reversal of 680579954849 is 948459975086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396270250000 + 284309704849 = 629500^2 + 533207^2 .

It is a cyclic number.

It is not a de Polignac number, because 680579954849 - 2⁴ = 680579954833 is a prime.

It is a super-2 number, since 2×680579954849² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (680579954839) 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, 340289977424 + 340289977425.

It is an arithmetic number, because the mean of its divisors is an integer number (340289977425).

Almost surely, 2^680579954849 is an apocalyptic number.

It is an amenable number.

680579954849 is a deficient number, since it is larger than the sum of its proper divisors (1).

680579954849 is an equidigital number, since it uses as much as digits as its factorization.

680579954849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 783820800, while the sum is 74.

The spelling of 680579954849 in words is "six hundred eighty billion, five hundred seventy-nine million, nine hundred fifty-four thousand, eight hundred forty-nine".