68543206733489 has 4 divisors (see below), whose sum is σ = 68679475534656. Its totient is φ = 68406937932324.

The previous prime is 68543206733401. The next prime is 68543206733501. The reversal of 68543206733489 is 98433760234586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68543206733489 is a prime.

It is a super-2 number, since 2×68543206733489² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68543206723489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68134399829 + ... + 68134400834.

It is an arithmetic number, because the mean of its divisors is an integer number (17169868883664).

Almost surely, 2^{68543206733489} is an apocalyptic number.

It is an amenable number.

68543206733489 is a deficient number, since it is larger than the sum of its proper divisors (136268801167).

68543206733489 is a wasteful number, since it uses less digits than its factorization.

68543206733489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136268801166.

The product of its (nonzero) digits is 627056640, while the sum is 68.

The spelling of 68543206733489 in words is "sixty-eight trillion, five hundred forty-three billion, two hundred six million, seven hundred thirty-three thousand, four hundred eighty-nine".