68491072459 has 2 divisors, whose sum is σ = 68491072460. Its totient is φ = 68491072458.

The previous prime is 68491072409. The next prime is 68491072513. The reversal of 68491072459 is 95427019486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68491072459 - 2¹¹ = 68491070411 is a prime.

It is not a weakly prime, because it can be changed into another prime (68491072409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34245536229 + 34245536230.

It is an arithmetic number, because the mean of its divisors is an integer number (34245536230).

Almost surely, 2^68491072459 is an apocalyptic number.

68491072459 is a deficient number, since it is larger than the sum of its proper divisors (1).

68491072459 is an equidigital number, since it uses as much as digits as its factorization.

68491072459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 68491072459 in words is "sixty-eight billion, four hundred ninety-one million, seventy-two thousand, four hundred fifty-nine".