68609211805728 has 72 divisors (see below), whose sum is σ = 212844486634416. Its totient is φ = 20790670243200.

The previous prime is 68609211805669. The next prime is 68609211805801. The reversal of 68609211805728 is 82750811290686.

68609211805728 is a `hidden beast` number, since 6 + 8 + 609 + 2 + 1 + 18 + 0 + 5 + 7 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10828470918 + ... + 10828477253.

It is an arithmetic number, because the mean of its divisors is an integer number (2956173425478).

Almost surely, 2^{68609211805728} is an apocalyptic number.

It is an amenable number.

68609211805728 is an abundant number, since it is smaller than the sum of its proper divisors (144235274828688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68609211805728 is a wasteful number, since it uses less digits than its factorization.

68609211805728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21656948198 (or 21656948187 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 63.

The spelling of 68609211805728 in words is "sixty-eight trillion, six hundred nine billion, two hundred eleven million, eight hundred five thousand, seven hundred twenty-eight".