268815461 has 2 divisors, whose sum is σ = 268815462. Its totient is φ = 268815460.

The previous prime is 268815451. The next prime is 268815479. The reversal of 268815461 is 164518862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246678436 + 22137025 = 15706^2 + 4705^2 .

It is a cyclic number.

It is not a de Polignac number, because 268815461 - 2¹⁰ = 268814437 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268815431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134407730 + 134407731.

It is an arithmetic number, because the mean of its divisors is an integer number (134407731).

Almost surely, 2^268815461 is an apocalyptic number.

It is an amenable number.

268815461 is a deficient number, since it is larger than the sum of its proper divisors (1).

268815461 is an equidigital number, since it uses as much as digits as its factorization.

268815461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92160, while the sum is 41.

The square root of 268815461 is about 16395.5927309750. The cubic root of 268815461 is about 645.3838317938.

The spelling of 268815461 in words is "two hundred sixty-eight million, eight hundred fifteen thousand, four hundred sixty-one".