268245581 has 4 divisors (see below), whose sum is σ = 271920252. Its totient is φ = 264570912.

The previous prime is 268245577. The next prime is 268245613. The reversal of 268245581 is 185542862.

It is a happy number.

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 199769956 + 68475625 = 14134^2 + 8275^2 .

It is a cyclic number.

It is not a de Polignac number, because 268245581 - 2² = 268245577 is a prime.

It is a super-4 number, since 4×268245581⁴ (a number of 35 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268245521) 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, 1837226 + ... + 1837371.

It is an arithmetic number, because the mean of its divisors is an integer number (67980063).

Almost surely, 2^268245581 is an apocalyptic number.

It is an amenable number.

268245581 is a deficient number, since it is larger than the sum of its proper divisors (3674671).

268245581 is an equidigital number, since it uses as much as digits as its factorization.

268245581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3674670.

The product of its digits is 153600, while the sum is 41.

The square root of 268245581 is about 16378.2044498168. The cubic root of 268245581 is about 644.9274449164.

The spelling of 268245581 in words is "two hundred sixty-eight million, two hundred forty-five thousand, five hundred eighty-one".