68685551869 has 24 divisors (see below), whose sum is σ = 77319688320. Its totient is φ = 60951660000.

The previous prime is 68685551861. The next prime is 68685551917. The reversal of 68685551869 is 96815558686.

It is not a de Polignac number, because 68685551869 - 2³ = 68685551861 is a prime.

It is a super-2 number, since 2×68685551869² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68685551861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 828112 + ... + 907270.

It is an arithmetic number, because the mean of its divisors is an integer number (3221653680).

Almost surely, 2^68685551869 is an apocalyptic number.

It is an amenable number.

68685551869 is a deficient number, since it is larger than the sum of its proper divisors (8634136451).

68685551869 is a wasteful number, since it uses less digits than its factorization.

68685551869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79353 (or 79342 counting only the distinct ones).

The product of its digits is 124416000, while the sum is 67.

The spelling of 68685551869 in words is "sixty-eight billion, six hundred eighty-five million, five hundred fifty-one thousand, eight hundred sixty-nine".