68055205577 has 2 divisors, whose sum is σ = 68055205578. Its totient is φ = 68055205576.

The previous prime is 68055205489. The next prime is 68055205601. The reversal of 68055205577 is 77550255086.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41348782336 + 26706423241 = 203344^2 + 163421^2 .

It is a cyclic number.

It is not a de Polignac number, because 68055205577 - 2¹² = 68055201481 is a prime.

It is a super-2 number, since 2×68055205577² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68055205877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34027602788 + 34027602789.

It is an arithmetic number, because the mean of its divisors is an integer number (34027602789).

Almost surely, 2^68055205577 is an apocalyptic number.

It is an amenable number.

68055205577 is a deficient number, since it is larger than the sum of its proper divisors (1).

68055205577 is an equidigital number, since it uses as much as digits as its factorization.

68055205577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2940000, while the sum is 50.

The spelling of 68055205577 in words is "sixty-eight billion, fifty-five million, two hundred five thousand, five hundred seventy-seven".