68695840159 has 2 divisors, whose sum is σ = 68695840160. Its totient is φ = 68695840158.

The previous prime is 68695840067. The next prime is 68695840193. The reversal of 68695840159 is 95104859686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68695840159 - 2¹¹ = 68695838111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68695840097 and 68695840106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68695843159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34347920079 + 34347920080.

It is an arithmetic number, because the mean of its divisors is an integer number (34347920080).

Almost surely, 2^68695840159 is an apocalyptic number.

68695840159 is a deficient number, since it is larger than the sum of its proper divisors (1).

68695840159 is an equidigital number, since it uses as much as digits as its factorization.

68695840159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18662400, while the sum is 61.

The spelling of 68695840159 in words is "sixty-eight billion, six hundred ninety-five million, eight hundred forty thousand, one hundred fifty-nine".