268005509 has 8 divisors (see below), whose sum is σ = 276840960. Its totient is φ = 259182000.

The previous prime is 268005503. The next prime is 268005539. The reversal of 268005509 is 905500862.

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 268005509 - 2⁸ = 268005253 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268005503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77387 + ... + 80775.

It is an arithmetic number, because the mean of its divisors is an integer number (34605120).

Almost surely, 2^268005509 is an apocalyptic number.

It is an amenable number.

268005509 is a deficient number, since it is larger than the sum of its proper divisors (8835451).

268005509 is a wasteful number, since it uses less digits than its factorization.

268005509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5971.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 268005509 is about 16370.8738007475. The cubic root of 268005509 is about 644.7349903839.

The spelling of 268005509 in words is "two hundred sixty-eight million, five thousand, five hundred nine".