268436647249 has 2 divisors, whose sum is σ = 268436647250. Its totient is φ = 268436647248.

The previous prime is 268436647207. The next prime is 268436647321. The reversal of 268436647249 is 942746634862.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267322089024 + 1114558225 = 517032^2 + 33385^2 .

It is a cyclic number.

It is not a de Polignac number, because 268436647249 - 2²³ = 268428258641 is a prime.

It is not a weakly prime, because it can be changed into another prime (268436647649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134218323624 + 134218323625.

It is an arithmetic number, because the mean of its divisors is an integer number (134218323625).

Almost surely, 2^268436647249 is an apocalyptic number.

It is an amenable number.

268436647249 is a deficient number, since it is larger than the sum of its proper divisors (1).

268436647249 is an equidigital number, since it uses as much as digits as its factorization.

268436647249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 83607552, while the sum is 61.

The spelling of 268436647249 in words is "two hundred sixty-eight billion, four hundred thirty-six million, six hundred forty-seven thousand, two hundred forty-nine".