268255861 has 4 divisors (see below), whose sum is σ = 269102412. Its totient is φ = 267409312.

The previous prime is 268255859. The next prime is 268255891. The reversal of 268255861 is 168552862.

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 80730225 + 187525636 = 8985^2 + 13694^2 .

It is a cyclic number.

It is not a de Polignac number, because 268255861 - 2¹ = 268255859 is a prime.

It is a super-2 number, since 2×268255861² = 143922413921702642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268255891) 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, 422800 + ... + 423433.

It is an arithmetic number, because the mean of its divisors is an integer number (67275603).

Almost surely, 2^268255861 is an apocalyptic number.

It is an amenable number.

268255861 is a deficient number, since it is larger than the sum of its proper divisors (846551).

268255861 is an equidigital number, since it uses as much as digits as its factorization.

268255861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846550.

The product of its digits is 230400, while the sum is 43.

The square root of 268255861 is about 16378.5182785257. The cubic root of 268255861 is about 644.9356833491.

The spelling of 268255861 in words is "two hundred sixty-eight million, two hundred fifty-five thousand, eight hundred sixty-one".