68721519467 has 2 divisors, whose sum is σ = 68721519468. Its totient is φ = 68721519466.

The previous prime is 68721519409. The next prime is 68721519497. The reversal of 68721519467 is 76491512786.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68721519467 is a prime.

It is not a weakly prime, because it can be changed into another prime (68721519497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34360759733 + 34360759734.

It is an arithmetic number, because the mean of its divisors is an integer number (34360759734).

Almost surely, 2^68721519467 is an apocalyptic number.

68721519467 is a deficient number, since it is larger than the sum of its proper divisors (1).

68721519467 is an equidigital number, since it uses as much as digits as its factorization.

68721519467 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5080320, while the sum is 56.

The spelling of 68721519467 in words is "sixty-eight billion, seven hundred twenty-one million, five hundred nineteen thousand, four hundred sixty-seven".