68395579999 has 2 divisors, whose sum is σ = 68395580000. Its totient is φ = 68395579998.

The previous prime is 68395579997. The next prime is 68395580047. The reversal of 68395579999 is 99997559386.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68395579999 - 2¹ = 68395579997 is a prime.

Together with 68395579997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68395579997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34197789999 + 34197790000.

It is an arithmetic number, because the mean of its divisors is an integer number (34197790000).

Almost surely, 2^68395579999 is an apocalyptic number.

68395579999 is a deficient number, since it is larger than the sum of its proper divisors (1).

68395579999 is an equidigital number, since it uses as much as digits as its factorization.

68395579999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1488034800, while the sum is 79.

The spelling of 68395579999 in words is "sixty-eight billion, three hundred ninety-five million, five hundred seventy-nine thousand, nine hundred ninety-nine".