68656872889 has 8 divisors (see below), whose sum is σ = 74900393568. Its totient is φ = 62413683360.

The previous prime is 68656872887. The next prime is 68656872899. The reversal of 68656872889 is 98827865686.

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

It is a cyclic number.

It is not a de Polignac number, because 68656872889 - 2¹ = 68656872887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68656872887) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 584874 + ... + 692380.

It is an arithmetic number, because the mean of its divisors is an integer number (9362549196).

Almost surely, 2^68656872889 is an apocalyptic number.

It is an amenable number.

68656872889 is a deficient number, since it is larger than the sum of its proper divisors (6243520679).

68656872889 is a wasteful number, since it uses less digits than its factorization.

68656872889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165575.

The product of its digits is 557383680, while the sum is 73.

The spelling of 68656872889 in words is "sixty-eight billion, six hundred fifty-six million, eight hundred seventy-two thousand, eight hundred eighty-nine".