268871681 has 16 divisors (see below), whose sum is σ = 296352000. Its totient is φ = 242431488.

The previous prime is 268871663. The next prime is 268871683. The reversal of 268871681 is 186178862.

It is a happy number.

It is not a de Polignac number, because 268871681 - 2²² = 264677377 is a prime.

It is a super-2 number, since 2×268871681² = 144583961687531522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268871683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98270 + ... + 100968.

It is an arithmetic number, because the mean of its divisors is an integer number (18522000).

Almost surely, 2^268871681 is an apocalyptic number.

It is an amenable number.

268871681 is a deficient number, since it is larger than the sum of its proper divisors (27480319).

268871681 is a wasteful number, since it uses less digits than its factorization.

268871681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2888.

The product of its digits is 258048, while the sum is 47.

The square root of 268871681 is about 16397.3071264766. The cubic root of 268871681 is about 645.4288204634.

The spelling of 268871681 in words is "two hundred sixty-eight million, eight hundred seventy-one thousand, six hundred eighty-one".