68856947933 has 2 divisors, whose sum is σ = 68856947934. Its totient is φ = 68856947932.

The previous prime is 68856947927. The next prime is 68856947959. The reversal of 68856947933 is 33974965886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66385068409 + 2471879524 = 257653^2 + 49718^2 .

It is a cyclic number.

It is not a de Polignac number, because 68856947933 - 2³⁰ = 67783206109 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68856947963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34428473966 + 34428473967.

It is an arithmetic number, because the mean of its divisors is an integer number (34428473967).

Almost surely, 2^68856947933 is an apocalyptic number.

It is an amenable number.

68856947933 is a deficient number, since it is larger than the sum of its proper divisors (1).

68856947933 is an equidigital number, since it uses as much as digits as its factorization.

68856947933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 235146240, while the sum is 68.

The spelling of 68856947933 in words is "sixty-eight billion, eight hundred fifty-six million, nine hundred forty-seven thousand, nine hundred thirty-three".