68791988807 has 2 divisors, whose sum is σ = 68791988808. Its totient is φ = 68791988806.

The previous prime is 68791988761. The next prime is 68791988831. The reversal of 68791988807 is 70888919786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68791988807 - 2¹⁶ = 68791923271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68791988887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34395994403 + 34395994404.

It is an arithmetic number, because the mean of its divisors is an integer number (34395994404).

Almost surely, 2^68791988807 is an apocalyptic number.

68791988807 is a deficient number, since it is larger than the sum of its proper divisors (1).

68791988807 is an equidigital number, since it uses as much as digits as its factorization.

68791988807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97542144, while the sum is 71.

The spelling of 68791988807 in words is "sixty-eight billion, seven hundred ninety-one million, nine hundred eighty-eight thousand, eight hundred seven".