268109109 has 20 divisors (see below), whose sum is σ = 402331776. Its totient is φ = 177925896.

The previous prime is 268109087. The next prime is 268109117. The reversal of 268109109 is 901901862.

It is a de Polignac number, because none of the positive numbers 2^k-268109109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268109119) 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 19 ways as a sum of consecutive naturals, for example, 10642 + ... + 25484.

Almost surely, 2^268109109 is an apocalyptic number.

It is an amenable number.

268109109 is a deficient number, since it is larger than the sum of its proper divisors (134222667).

268109109 is a wasteful number, since it uses less digits than its factorization.

268109109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15078 (or 15069 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 268109109 is about 16374.0376511110. The cubic root of 268109109 is about 644.8180557662.

The spelling of 268109109 in words is "two hundred sixty-eight million, one hundred nine thousand, one hundred nine".