268563685881 has 8 divisors (see below), whose sum is σ = 359406262144. Its totient is φ = 178381783440.

The previous prime is 268563685853. The next prime is 268563685883. The reversal of 268563685881 is 188586365862.

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

It is not a de Polignac number, because 268563685881 - 2¹¹ = 268563683833 is a prime.

It is a super-2 number, since 2×268563685881² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268563685883) 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, 165167506 + ... + 165169131.

It is an arithmetic number, because the mean of its divisors is an integer number (44925782768).

Almost surely, 2^268563685881 is an apocalyptic number.

It is an amenable number.

268563685881 is a deficient number, since it is larger than the sum of its proper divisors (90842576263).

268563685881 is a wasteful number, since it uses less digits than its factorization.

268563685881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330336911.

The product of its digits is 132710400, while the sum is 66.

The spelling of 268563685881 in words is "two hundred sixty-eight billion, five hundred sixty-three million, six hundred eighty-five thousand, eight hundred eighty-one".