68969728318 has 4 divisors (see below), whose sum is σ = 103454592480. Its totient is φ = 34484864158.

The previous prime is 68969728279. The next prime is 68969728369. The reversal of 68969728318 is 81382796986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81382796986 = 2 ⋅40691398493.

It is a super-2 number, since 2×68969728318² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 17242432078 + ... + 17242432081.

It is an arithmetic number, because the mean of its divisors is an integer number (25863648120).

Almost surely, 2^68969728318 is an apocalyptic number.

68969728318 is a deficient number, since it is larger than the sum of its proper divisors (34484864162).

68969728318 is a wasteful number, since it uses less digits than its factorization.

68969728318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34484864161.

The product of its digits is 62705664, while the sum is 67.

The spelling of 68969728318 in words is "sixty-eight billion, nine hundred sixty-nine million, seven hundred twenty-eight thousand, three hundred eighteen".