68831585393 has 4 divisors (see below), whose sum is σ = 68832683748. Its totient is φ = 68830487040.

The previous prime is 68831585387. The next prime is 68831585441. The reversal of 68831585393 is 39358513886.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32389920784 + 36441664609 = 179972^2 + 190897^2 .

It is a cyclic number.

It is not a de Polignac number, because 68831585393 - 2¹⁶ = 68831519857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68831585363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449096 + ... + 582537.

It is an arithmetic number, because the mean of its divisors is an integer number (17208170937).

Almost surely, 2^68831585393 is an apocalyptic number.

It is an amenable number.

68831585393 is a deficient number, since it is larger than the sum of its proper divisors (1098355).

68831585393 is a wasteful number, since it uses less digits than its factorization.

68831585393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098354.

The product of its digits is 18662400, while the sum is 59.

The spelling of 68831585393 in words is "sixty-eight billion, eight hundred thirty-one million, five hundred eighty-five thousand, three hundred ninety-three".