1313765258965 has 4 divisors (see below), whose sum is σ = 1576518310764. Its totient is φ = 1051012207168.

The previous prime is 1313765258959. The next prime is 1313765258983. The reversal of 1313765258965 is 5698525673131.

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 908975373604 + 404789885361 = 953402^2 + 636231^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313765258965 - 2⁷ = 1313765258837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131376525892 + ... + 131376525901.

It is an arithmetic number, because the mean of its divisors is an integer number (394129577691).

Almost surely, 2^{1313765258965} is an apocalyptic number.

It is an amenable number.

1313765258965 is a deficient number, since it is larger than the sum of its proper divisors (262753051799).

1313765258965 is an equidigital number, since it uses as much as digits as its factorization.

1313765258965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262753051798.

The product of its digits is 40824000, while the sum is 61.

The spelling of 1313765258965 in words is "one trillion, three hundred thirteen billion, seven hundred sixty-five million, two hundred fifty-eight thousand, nine hundred sixty-five".