68081517583 has 2 divisors, whose sum is σ = 68081517584. Its totient is φ = 68081517582.

The previous prime is 68081517503. The next prime is 68081517589. The reversal of 68081517583 is 38571518086.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68081517583 - 2⁹ = 68081517071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68081517583.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68081517589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34040758791 + 34040758792.

It is an arithmetic number, because the mean of its divisors is an integer number (34040758792).

Almost surely, 2^68081517583 is an apocalyptic number.

68081517583 is a deficient number, since it is larger than the sum of its proper divisors (1).

68081517583 is an equidigital number, since it uses as much as digits as its factorization.

68081517583 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1612800, while the sum is 52.

The spelling of 68081517583 in words is "sixty-eight billion, eighty-one million, five hundred seventeen thousand, five hundred eighty-three".