68888568657 has 16 divisors (see below), whose sum is σ = 95993164800. Its totient is φ = 43861017552.

The previous prime is 68888568587. The next prime is 68888568667. The reversal of 68888568657 is 75686588886.

It is not a de Polignac number, because 68888568657 - 2⁸ = 68888568401 is a prime.

It is a super-2 number, since 2×68888568657² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68888568667) 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 15 ways as a sum of consecutive naturals, for example, 726907 + ... + 816192.

It is an arithmetic number, because the mean of its divisors is an integer number (5999572800).

Almost surely, 2^68888568657 is an apocalyptic number.

It is an amenable number.

68888568657 is a deficient number, since it is larger than the sum of its proper divisors (27104596143).

68888568657 is a wasteful number, since it uses less digits than its factorization.

68888568657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543772.

The product of its digits is 1238630400, while the sum is 75.

The spelling of 68888568657 in words is "sixty-eight billion, eight hundred eighty-eight million, five hundred sixty-eight thousand, six hundred fifty-seven".