68738011687 has 2 divisors, whose sum is σ = 68738011688. Its totient is φ = 68738011686.

The previous prime is 68738011619. The next prime is 68738011709. The reversal of 68738011687 is 78611083786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68738011687 - 2¹⁵ = 68737978919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68738011187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34369005843 + 34369005844.

It is an arithmetic number, because the mean of its divisors is an integer number (34369005844).

Almost surely, 2^68738011687 is an apocalyptic number.

68738011687 is a deficient number, since it is larger than the sum of its proper divisors (1).

68738011687 is an equidigital number, since it uses as much as digits as its factorization.

68738011687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2709504, while the sum is 55.

The spelling of 68738011687 in words is "sixty-eight billion, seven hundred thirty-eight million, eleven thousand, six hundred eighty-seven".