67727928412811 has 4 divisors (see below), whose sum is σ = 68385481115952. Its totient is φ = 67070375709672.

The previous prime is 67727928412799. The next prime is 67727928412843. The reversal of 67727928412811 is 11821482972776.

67727928412811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67727928412811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67727928412411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328776351416 + ... + 328776351621.

It is an arithmetic number, because the mean of its divisors is an integer number (17096370278988).

Almost surely, 2^{67727928412811} is an apocalyptic number.

67727928412811 is a deficient number, since it is larger than the sum of its proper divisors (657552703141).

67727928412811 is a wasteful number, since it uses less digits than its factorization.

67727928412811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657552703140.

The product of its digits is 37933056, while the sum is 65.

The spelling of 67727928412811 in words is "sixty-seven trillion, seven hundred twenty-seven billion, nine hundred twenty-eight million, four hundred twelve thousand, eight hundred eleven".