68506529593 has 2 divisors, whose sum is σ = 68506529594. Its totient is φ = 68506529592.

The previous prime is 68506529591. The next prime is 68506529657. The reversal of 68506529593 is 39592560586.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40532963584 + 27973566009 = 201328^2 + 167253^2 .

It is a cyclic number.

It is not a de Polignac number, because 68506529593 - 2¹ = 68506529591 is a prime.

Together with 68506529591, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68506529591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34253264796 + 34253264797.

It is an arithmetic number, because the mean of its divisors is an integer number (34253264797).

Almost surely, 2^68506529593 is an apocalyptic number.

It is an amenable number.

68506529593 is a deficient number, since it is larger than the sum of its proper divisors (1).

68506529593 is an equidigital number, since it uses as much as digits as its factorization.

68506529593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496000, while the sum is 58.

The spelling of 68506529593 in words is "sixty-eight billion, five hundred six million, five hundred twenty-nine thousand, five hundred ninety-three".