68851811 has 24 divisors (see below), whose sum is σ = 84268800. Its totient is φ = 55983312.

The previous prime is 68851807. The next prime is 68851847. The reversal of 68851811 is 11815886.

It is not a de Polignac number, because 68851811 - 2² = 68851807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68851511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 224120 + ... + 224426.

It is an arithmetic number, because the mean of its divisors is an integer number (3511200).

Almost surely, 2^68851811 is an apocalyptic number.

68851811 is a deficient number, since it is larger than the sum of its proper divisors (15416989).

68851811 is a wasteful number, since it uses less digits than its factorization.

68851811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543 (or 536 counting only the distinct ones).

The product of its digits is 15360, while the sum is 38.

The square root of 68851811 is about 8297.6991389180. The cubic root of 68851811 is about 409.8627559675.

The spelling of 68851811 in words is "sixty-eight million, eight hundred fifty-one thousand, eight hundred eleven".