68312866869 has 12 divisors (see below), whose sum is σ = 106264459756. Its totient is φ = 42038687232.

The previous prime is 68312866849. The next prime is 68312866879. The reversal of 68312866869 is 96866821386.

It can be written as a sum of positive squares in 2 ways, for example, as 37849702500 + 30463164369 = 194550^2 + 174537^2 .

It is not a de Polignac number, because 68312866869 - 2¹² = 68312862773 is a prime.

It is a super-2 number, since 2×68312866869² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68312866849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 291935212 + ... + 291935445.

Almost surely, 2^68312866869 is an apocalyptic number.

It is an amenable number.

68312866869 is a deficient number, since it is larger than the sum of its proper divisors (37951592887).

68312866869 is a wasteful number, since it uses less digits than its factorization.

68312866869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583870676 (or 583870673 counting only the distinct ones).

The product of its digits is 35831808, while the sum is 63.

The spelling of 68312866869 in words is "sixty-eight billion, three hundred twelve million, eight hundred sixty-six thousand, eight hundred sixty-nine".