68457546439 has 2 divisors, whose sum is σ = 68457546440. Its totient is φ = 68457546438.

The previous prime is 68457546433. The next prime is 68457546461. The reversal of 68457546439 is 93464575486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68457546439 - 2³ = 68457546431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68457546431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34228773219 + 34228773220.

It is an arithmetic number, because the mean of its divisors is an integer number (34228773220).

Almost surely, 2^68457546439 is an apocalyptic number.

68457546439 is a deficient number, since it is larger than the sum of its proper divisors (1).

68457546439 is an equidigital number, since it uses as much as digits as its factorization.

68457546439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87091200, while the sum is 61.

The spelling of 68457546439 in words is "sixty-eight billion, four hundred fifty-seven million, five hundred forty-six thousand, four hundred thirty-nine".