268561636 has 12 divisors (see below), whose sum is σ = 537123328. Its totient is φ = 115097832.

The previous prime is 268561621. The next prime is 268561681. The reversal of 268561636 is 636165862.

268561636 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 268561592 and 268561601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4795716 + ... + 4795771.

Almost surely, 2^268561636 is an apocalyptic number.

It is an amenable number.

268561636 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

268561636 is a wasteful number, since it uses less digits than its factorization.

268561636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9591498 (or 9591496 counting only the distinct ones).

The product of its digits is 311040, while the sum is 43.

The square root of 268561636 is about 16387.8502556009. The cubic root of 268561636 is about 645.1806364649.

The spelling of 268561636 in words is "two hundred sixty-eight million, five hundred sixty-one thousand, six hundred thirty-six".