68500499077 has 2 divisors, whose sum is σ = 68500499078. Its totient is φ = 68500499076.

The previous prime is 68500499071. The next prime is 68500499107. The reversal of 68500499077 is 77099400586.

It is a Cunningham number, because it is equal to 261726²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68500499076 + 1 = 261726^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 68500499077 - 2²⁷ = 68366281349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68500499071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34250249538 + 34250249539.

It is an arithmetic number, because the mean of its divisors is an integer number (34250249539).

Almost surely, 2^68500499077 is an apocalyptic number.

It is an amenable number.

68500499077 is a deficient number, since it is larger than the sum of its proper divisors (1).

68500499077 is an equidigital number, since it uses as much as digits as its factorization.

68500499077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 68500499077 in words is "sixty-eight billion, five hundred million, four hundred ninety-nine thousand, seventy-seven".