68245815089 has 2 divisors, whose sum is σ = 68245815090. Its totient is φ = 68245815088.

The previous prime is 68245815047. The next prime is 68245815091. The reversal of 68245815089 is 98051854286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66778312225 + 1467502864 = 258415^2 + 38308^2 .

It is a cyclic number.

It is not a de Polignac number, because 68245815089 - 2¹² = 68245810993 is a prime.

Together with 68245815091, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68245815689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34122907544 + 34122907545.

It is an arithmetic number, because the mean of its divisors is an integer number (34122907545).

Almost surely, 2^68245815089 is an apocalyptic number.

It is an amenable number.

68245815089 is a deficient number, since it is larger than the sum of its proper divisors (1).

68245815089 is an equidigital number, since it uses as much as digits as its factorization.

68245815089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5529600, while the sum is 56.

The spelling of 68245815089 in words is "sixty-eight billion, two hundred forty-five million, eight hundred fifteen thousand, eighty-nine".