68632117313 has 4 divisors (see below), whose sum is σ = 69092735700. Its totient is φ = 68171498928.

The previous prime is 68632117289. The next prime is 68632117331. The reversal of 68632117313 is 31371123686.

It is a happy number.

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 29373846544 + 39258270769 = 171388^2 + 198137^2 .

It is a cyclic number.

It is not a de Polignac number, because 68632117313 - 2¹² = 68632113217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68632116313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230308970 + ... + 230309267.

It is an arithmetic number, because the mean of its divisors is an integer number (17273183925).

Almost surely, 2^68632117313 is an apocalyptic number.

It is an amenable number.

68632117313 is a deficient number, since it is larger than the sum of its proper divisors (460618387).

68632117313 is a wasteful number, since it uses less digits than its factorization.

68632117313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460618386.

The product of its digits is 108864, while the sum is 41.

The spelling of 68632117313 in words is "sixty-eight billion, six hundred thirty-two million, one hundred seventeen thousand, three hundred thirteen".