68721508267 has 2 divisors, whose sum is σ = 68721508268. Its totient is φ = 68721508266.

The previous prime is 68721508259. The next prime is 68721508351. The reversal of 68721508267 is 76280512786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68721508267 - 2³ = 68721508259 is a prime.

It is not a weakly prime, because it can be changed into another prime (68721508217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34360754133 + 34360754134.

It is an arithmetic number, because the mean of its divisors is an integer number (34360754134).

Almost surely, 2^68721508267 is an apocalyptic number.

68721508267 is a deficient number, since it is larger than the sum of its proper divisors (1).

68721508267 is an equidigital number, since it uses as much as digits as its factorization.

68721508267 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2257920, while the sum is 52.

The spelling of 68721508267 in words is "sixty-eight billion, seven hundred twenty-one million, five hundred eight thousand, two hundred sixty-seven".