268375810809 has 4 divisors (see below), whose sum is σ = 357834414416. Its totient is φ = 178917207204.

The previous prime is 268375810777. The next prime is 268375810837. The reversal of 268375810809 is 908018573862.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 268375810809 - 2⁵ = 268375810777 is a prime.

It is a super-2 number, since 2×268375810809² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (268375810609) 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, 44729301799 + ... + 44729301804.

It is an arithmetic number, because the mean of its divisors is an integer number (89458603604).

Almost surely, 2^268375810809 is an apocalyptic number.

It is an amenable number.

268375810809 is a deficient number, since it is larger than the sum of its proper divisors (89458603607).

268375810809 is an equidigital number, since it uses as much as digits as its factorization.

268375810809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89458603606.

The product of its (nonzero) digits is 5806080, while the sum is 57.

The spelling of 268375810809 in words is "two hundred sixty-eight billion, three hundred seventy-five million, eight hundred ten thousand, eight hundred nine".