268306388290 has 16 divisors (see below), whose sum is σ = 482963637240. Its totient is φ = 107319857920.

The previous prime is 268306388281. The next prime is 268306388327. The reversal of 268306388290 is 92883603862.

268306388290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 517983²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 268306388289 + 1 = 517983^2 + 1^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108666 + ... + 740554.

Almost surely, 2^268306388290 is an apocalyptic number.

268306388290 is a deficient number, since it is larger than the sum of its proper divisors (214657248950).

268306388290 is a wasteful number, since it uses less digits than its factorization.

268306388290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674357.

The product of its (nonzero) digits is 5971968, while the sum is 55.

The spelling of 268306388290 in words is "two hundred sixty-eight billion, three hundred six million, three hundred eighty-eight thousand, two hundred ninety".