68185447888 has 10 divisors (see below), whose sum is σ = 132109305314. Its totient is φ = 34092723936.

The previous prime is 68185447873. The next prime is 68185447933. The reversal of 68185447888 is 88874458186.

It can be written as a sum of positive squares in only one way, i.e., 61748274064 + 6437173824 = 248492^2 + 80232^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2130795231 + ... + 2130795262.

Almost surely, 2^68185447888 is an apocalyptic number.

It is an amenable number.

68185447888 is a deficient number, since it is larger than the sum of its proper divisors (63923857426).

68185447888 is a wasteful number, since it uses less digits than its factorization.

68185447888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4261590501 (or 4261590495 counting only the distinct ones).

The product of its digits is 110100480, while the sum is 67.

The spelling of 68185447888 in words is "sixty-eight billion, one hundred eighty-five million, four hundred forty-seven thousand, eight hundred eighty-eight".