68491226317 has 8 divisors (see below), whose sum is σ = 69811330680. Its totient is φ = 67172152320.

The previous prime is 68491226273. The next prime is 68491226347. The reversal of 68491226317 is 71362219486.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5179105156 + 63312121161 = 71966^2 + 251619^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68491226317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68491226347) 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, 122692 + ... + 389917.

It is an arithmetic number, because the mean of its divisors is an integer number (8726416335).

Almost surely, 2^68491226317 is an apocalyptic number.

It is an amenable number.

68491226317 is a deficient number, since it is larger than the sum of its proper divisors (1320104363).

68491226317 is a wasteful number, since it uses less digits than its factorization.

68491226317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515183.

The product of its digits is 870912, while the sum is 49.

The spelling of 68491226317 in words is "sixty-eight billion, four hundred ninety-one million, two hundred twenty-six thousand, three hundred seventeen".