268475489281 has 4 divisors (see below), whose sum is σ = 269087051200. Its totient is φ = 267863927364.

The previous prime is 268475489279. The next prime is 268475489287. The reversal of 268475489281 is 182984574862.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 268475489281 - 2¹ = 268475489279 is a prime.

It is a super-2 number, since 2×268475489281² (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 (268475489287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305780301 + ... + 305781178.

It is an arithmetic number, because the mean of its divisors is an integer number (67271762800).

Almost surely, 2^268475489281 is an apocalyptic number.

It is an amenable number.

268475489281 is a deficient number, since it is larger than the sum of its proper divisors (611561919).

268475489281 is an equidigital number, since it uses as much as digits as its factorization.

268475489281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611561918.

The product of its digits is 61931520, while the sum is 64.

The spelling of 268475489281 in words is "two hundred sixty-eight billion, four hundred seventy-five million, four hundred eighty-nine thousand, two hundred eighty-one".