268553081 has 4 divisors (see below), whose sum is σ = 269210100. Its totient is φ = 267896064.

The previous prime is 268553069. The next prime is 268553099. The reversal of 268553081 is 180355862.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 127893481 + 140659600 = 11309^2 + 11860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268553081 is a prime.

It is a super-2 number, since 2×268553081² = 144241514629185122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268553281) 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, 327896 + ... + 328713.

It is an arithmetic number, because the mean of its divisors is an integer number (67302525).

Almost surely, 2^268553081 is an apocalyptic number.

It is an amenable number.

268553081 is a deficient number, since it is larger than the sum of its proper divisors (657019).

268553081 is an equidigital number, since it uses as much as digits as its factorization.

268553081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657018.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 268553081 is about 16387.5892369805. The cubic root of 268553081 is about 645.1737856739.

The spelling of 268553081 in words is "two hundred sixty-eight million, five hundred fifty-three thousand, eighty-one".