68743834787 has 4 divisors (see below), whose sum is σ = 68744467896. Its totient is φ = 68743201680.

The previous prime is 68743834729. The next prime is 68743834799. The reversal of 68743834787 is 78743834786.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 78743834786 = 2 ⋅39371917393.

It is a cyclic number.

It is not a de Polignac number, because 68743834787 - 2³² = 64448867491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68743830787) 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, 107789 + ... + 386142.

It is an arithmetic number, because the mean of its divisors is an integer number (17186116974).

Almost surely, 2^68743834787 is an apocalyptic number.

68743834787 is a deficient number, since it is larger than the sum of its proper divisors (633109).

68743834787 is a wasteful number, since it uses less digits than its factorization.

68743834787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633108.

The product of its digits is 151732224, while the sum is 65.

Subtracting 68743834787 from its reverse (78743834786), we obtain a palindrome (9999999999).

The spelling of 68743834787 in words is "sixty-eight billion, seven hundred forty-three million, eight hundred thirty-four thousand, seven hundred eighty-seven".