68738638043 has 2 divisors, whose sum is σ = 68738638044. Its totient is φ = 68738638042.

The previous prime is 68738637997. The next prime is 68738638091. The reversal of 68738638043 is 34083683786.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68738638043 - 2⁸ = 68738637787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68738638043.

It is not a weakly prime, because it can be changed into another prime (68738638093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34369319021 + 34369319022.

It is an arithmetic number, because the mean of its divisors is an integer number (34369319022).

Almost surely, 2^68738638043 is an apocalyptic number.

68738638043 is a deficient number, since it is larger than the sum of its proper divisors (1).

68738638043 is an equidigital number, since it uses as much as digits as its factorization.

68738638043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13934592, while the sum is 56.

The spelling of 68738638043 in words is "sixty-eight billion, seven hundred thirty-eight million, six hundred thirty-eight thousand, forty-three".