268891617 has 8 divisors (see below), whose sum is σ = 368212096. Its totient is φ = 174416112.

The previous prime is 268891603. The next prime is 268891621. The reversal of 268891617 is 716198862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 268891617 - 2⁸ = 268891361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268891627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1211113 + ... + 1211334.

It is an arithmetic number, because the mean of its divisors is an integer number (46026512).

Almost surely, 2^268891617 is an apocalyptic number.

It is an amenable number.

268891617 is a deficient number, since it is larger than the sum of its proper divisors (99320479).

268891617 is a wasteful number, since it uses less digits than its factorization.

268891617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2422487.

The product of its digits is 290304, while the sum is 48.

The square root of 268891617 is about 16397.9150199042. The cubic root of 268891617 is about 645.4447722499. Note that the first 3 decimals are identical.

The spelling of 268891617 in words is "two hundred sixty-eight million, eight hundred ninety-one thousand, six hundred seventeen".