68228916081 has 8 divisors (see below), whose sum is σ = 92463230784. Its totient is φ = 44740272720.

The previous prime is 68228916073. The next prime is 68228916121. The reversal of 68228916081 is 18061982286.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68228916081 - 2³ = 68228916073 is a prime.

It is a super-2 number, since 2×68228916081² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68228916061) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 186417621 + ... + 186417986.

It is an arithmetic number, because the mean of its divisors is an integer number (11557903848).

Almost surely, 2^68228916081 is an apocalyptic number.

68228916081 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

68228916081 is a deficient number, since it is larger than the sum of its proper divisors (24234314703).

68228916081 is a wasteful number, since it uses less digits than its factorization.

68228916081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372835671.

The product of its (nonzero) digits is 663552, while the sum is 51.

The spelling of 68228916081 in words is "sixty-eight billion, two hundred twenty-eight million, nine hundred sixteen thousand, eighty-one".