68781308593 has 8 divisors (see below), whose sum is σ = 73098006120. Its totient is φ = 64494693120.

The previous prime is 68781308591. The next prime is 68781308633. The reversal of 68781308593 is 39580318786.

It can be written as a sum of positive squares in 4 ways, for example, as 2925944464 + 65855364129 = 54092^2 + 256623^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68781308593 - 2¹ = 68781308591 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68781308591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7515798 + ... + 7524943.

It is an arithmetic number, because the mean of its divisors is an integer number (9137250765).

Almost surely, 2^68781308593 is an apocalyptic number.

It is an amenable number.

68781308593 is a deficient number, since it is larger than the sum of its proper divisors (4316697527).

68781308593 is a wasteful number, since it uses less digits than its factorization.

68781308593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15041027.

The product of its (nonzero) digits is 8709120, while the sum is 58.

The spelling of 68781308593 in words is "sixty-eight billion, seven hundred eighty-one million, three hundred eight thousand, five hundred ninety-three".