68340113503 has 4 divisors (see below), whose sum is σ = 68347367728. Its totient is φ = 68332859280.

The previous prime is 68340113497. The next prime is 68340113507. The reversal of 68340113503 is 30531104386.

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

It is a cyclic number.

It is not a de Polignac number, because 68340113503 - 2²⁵ = 68306559071 is a prime.

It is a super-2 number, since 2×68340113503² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68340113507) 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, 3612963 + ... + 3631828.

It is an arithmetic number, because the mean of its divisors is an integer number (17086841932).

Almost surely, 2^68340113503 is an apocalyptic number.

68340113503 is a deficient number, since it is larger than the sum of its proper divisors (7254225).

68340113503 is an equidigital number, since it uses as much as digits as its factorization.

68340113503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7254224.

The product of its (nonzero) digits is 25920, while the sum is 34.

Adding to 68340113503 its reverse (30531104386), we get a palindrome (98871217889).

The spelling of 68340113503 in words is "sixty-eight billion, three hundred forty million, one hundred thirteen thousand, five hundred three".