268588207709 has 4 divisors (see below), whose sum is σ = 268994544540. Its totient is φ = 268181870880.

The previous prime is 268588207697. The next prime is 268588207751. The reversal of 268588207709 is 907702885862.

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 136564985209 + 132023222500 = 369547^2 + 363350^2 .

It is a cyclic number.

It is not a de Polignac number, because 268588207709 - 2⁸ = 268588207453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268588207109) 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, 203167424 + ... + 203168745.

It is an arithmetic number, because the mean of its divisors is an integer number (67248636135).

Almost surely, 2^268588207709 is an apocalyptic number.

It is an amenable number.

268588207709 is a deficient number, since it is larger than the sum of its proper divisors (406336831).

268588207709 is an equidigital number, since it uses as much as digits as its factorization.

268588207709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406336830.

The product of its (nonzero) digits is 27095040, while the sum is 62.

The spelling of 268588207709 in words is "two hundred sixty-eight billion, five hundred eighty-eight million, two hundred seven thousand, seven hundred nine".