68927786780177 has 16 divisors (see below), whose sum is σ = 76330373852880. Its totient is φ = 61829515164672.

The previous prime is 68927786780129. The next prime is 68927786780261. The reversal of 68927786780177 is 77108768772986.

It is a Cunningham number, because it is equal to 8302276²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 10196424057856 + 58731362722321 = 3193184^2 + 7663639^2 .

It is a cyclic number.

It is not a de Polignac number, because 68927786780177 - 2¹⁸ = 68927786518033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68927786780095 and 68927786780104.

It is not an unprimeable number, because it can be changed into a prime (68927786780477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88177628 + ... + 88955885.

It is an arithmetic number, because the mean of its divisors is an integer number (4770648365805).

Almost surely, 2^{68927786780177} is an apocalyptic number.

It is an amenable number.

68927786780177 is a deficient number, since it is larger than the sum of its proper divisors (7402587072703).

68927786780177 is a wasteful number, since it uses less digits than its factorization.

68927786780177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177134372.

The product of its (nonzero) digits is 5576159232, while the sum is 83.

The spelling of 68927786780177 in words is "sixty-eight trillion, nine hundred twenty-seven billion, seven hundred eighty-six million, seven hundred eighty thousand, one hundred seventy-seven".