1268895068965 has 4 divisors (see below), whose sum is σ = 1522674082764.
Its totient is φ = 1015116055168.
The previous prime is 1268895068957. The next prime is 1268895068977. The reversal of 1268895068965 is 5698605988621.
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 826704648289 + 442190420676 = 909233^2 + 664974^2
It is a cyclic number.
It is not a de Polignac number, because 1268895068965 - 23 = 1268895068957 is a prime.
It is a super-2 number, since 2×12688950689652 (a number of 25 digits) contains 22 as substring.
It is a Duffinian number.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126889506892 + ... + 126889506901.
It is an arithmetic number, because the mean of its divisors is an integer number (380668520691).
Almost surely, 21268895068965 is an apocalyptic number.
It is an amenable number.
1268895068965 is a deficient number, since it is larger than the sum of its proper divisors (253779013799).
1268895068965 is an equidigital number, since it uses as much as digits as its factorization.
1268895068965 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 253779013798.
The product of its (nonzero) digits is 447897600, while the sum is 73.
The spelling of 1268895068965 in words is "one trillion, two hundred sixty-eight billion, eight hundred ninety-five million, sixty-eight thousand, nine hundred sixty-five".