68840681969 has 12 divisors (see below), whose sum is σ = 69234162816. Its totient is φ = 68449248912.

The previous prime is 68840681963. The next prime is 68840681971. The reversal of 68840681969 is 96918604886.

It is not a de Polignac number, because 68840681969 - 2¹⁶ = 68840616433 is a prime.

It is a super-2 number, since 2×68840681969² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68840681963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62411672 + ... + 62412774.

It is an arithmetic number, because the mean of its divisors is an integer number (5769513568).

Almost surely, 2^68840681969 is an apocalyptic number.

It is an amenable number.

68840681969 is a deficient number, since it is larger than the sum of its proper divisors (393480847).

68840681969 is an equidigital number, since it uses as much as digits as its factorization.

68840681969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2416 (or 2123 counting only the distinct ones).

The product of its (nonzero) digits is 35831808, while the sum is 65.

The spelling of 68840681969 in words is "sixty-eight billion, eight hundred forty million, six hundred eighty-one thousand, nine hundred sixty-nine".