68543833357 has 4 divisors (see below), whose sum is σ = 68568733980. Its totient is φ = 68518932736.

The previous prime is 68543833327. The next prime is 68543833381. The reversal of 68543833357 is 75333834586.

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 55423047241 + 13120786116 = 235421^2 + 114546^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68543833357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68543833298 and 68543833307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68543833327) 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, 12446182 + ... + 12451687.

It is an arithmetic number, because the mean of its divisors is an integer number (17142183495).

Almost surely, 2^68543833357 is an apocalyptic number.

It is an amenable number.

68543833357 is a deficient number, since it is larger than the sum of its proper divisors (24900623).

68543833357 is a wasteful number, since it uses less digits than its factorization.

68543833357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24900622.

The product of its digits is 21772800, while the sum is 55.

The spelling of 68543833357 in words is "sixty-eight billion, five hundred forty-three million, eight hundred thirty-three thousand, three hundred fifty-seven".