68100720071 has 2 divisors, whose sum is σ = 68100720072. Its totient is φ = 68100720070.

The previous prime is 68100720059. The next prime is 68100720109. The reversal of 68100720071 is 17002700186.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68100720071 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68100720001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34050360035 + 34050360036.

It is an arithmetic number, because the mean of its divisors is an integer number (34050360036).

Almost surely, 2^68100720071 is an apocalyptic number.

68100720071 is a deficient number, since it is larger than the sum of its proper divisors (1).

68100720071 is an equidigital number, since it uses as much as digits as its factorization.

68100720071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 32.

The spelling of 68100720071 in words is "sixty-eight billion, one hundred million, seven hundred twenty thousand, seventy-one".