68928728211 has 144 divisors (see below), whose sum is σ = 120967123680. Its totient is φ = 37688232960.

The previous prime is 68928728201. The next prime is 68928728233. The reversal of 68928728211 is 11282782986.

68928728211 is a `hidden beast` number, since 6 + 89 + 287 + 282 + 1 + 1 = 666.

It is not a de Polignac number, because 68928728211 - 2¹⁹ = 68928203923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68928728201) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 217440625 + ... + 217440941.

It is an arithmetic number, because the mean of its divisors is an integer number (840049470).

Almost surely, 2^68928728211 is an apocalyptic number.

68928728211 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

68928728211 is a deficient number, since it is larger than the sum of its proper divisors (52038395469).

68928728211 is a wasteful number, since it uses less digits than its factorization.

68928728211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594 (or 584 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 54.

The spelling of 68928728211 in words is "sixty-eight billion, nine hundred twenty-eight million, seven hundred twenty-eight thousand, two hundred eleven".