68808081069 has 256 divisors, whose sum is σ = 136480153600. Its totient is φ = 33256396800.

The previous prime is 68808081061. The next prime is 68808081071. The reversal of 68808081069 is 96018080886.

It is not a de Polignac number, because 68808081069 - 2³ = 68808081061 is a prime.

It is a super-2 number, since 2×68808081069² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68808081061) 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 255 ways as a sum of consecutive naturals, for example, 207879234 + ... + 207879564.

It is an arithmetic number, because the mean of its divisors is an integer number (533125600).

Almost surely, 2^68808081069 is an apocalyptic number.

It is an amenable number.

68808081069 is a deficient number, since it is larger than the sum of its proper divisors (67672072531).

68808081069 is a wasteful number, since it uses less digits than its factorization.

68808081069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513 (or 507 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 54.

The spelling of 68808081069 in words is "sixty-eight billion, eight hundred eight million, eighty-one thousand, sixty-nine".