68255475688 has 16 divisors (see below), whose sum is σ = 129781539360. Its totient is φ = 33647065200.

The previous prime is 68255475667. The next prime is 68255475703. The reversal of 68255475688 is 88657455286.

It is a super-2 number, since 2×68255475688² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60083478 + ... + 60084613.

It is an arithmetic number, because the mean of its divisors is an integer number (8111346210).

Almost surely, 2^68255475688 is an apocalyptic number.

It is an amenable number.

68255475688 is a deficient number, since it is larger than the sum of its proper divisors (61526063672).

68255475688 is a wasteful number, since it uses less digits than its factorization.

68255475688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120168168 (or 120168164 counting only the distinct ones).

The product of its digits is 129024000, while the sum is 64.

The spelling of 68255475688 in words is "sixty-eight billion, two hundred fifty-five million, four hundred seventy-five thousand, six hundred eighty-eight".