1313563556365 has 4 divisors (see below), whose sum is σ = 1576276267644. Its totient is φ = 1050850845088.

The previous prime is 1313563556353. The next prime is 1313563556377. The reversal of 1313563556365 is 5636553653131.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1313563556353) and next prime (1313563556377).

It can be written as a sum of positive squares in 2 ways, for example, as 221816508676 + 1091747047689 = 470974^2 + 1044867^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313563556365 - 2²⁵ = 1313530001933 is a prime.

It is a super-2 number, since 2×1313563556365² (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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131356355632 + ... + 131356355641.

It is an arithmetic number, because the mean of its divisors is an integer number (394069066911).

Almost surely, 2^{1313563556365} is an apocalyptic number.

It is an amenable number.

1313563556365 is a deficient number, since it is larger than the sum of its proper divisors (262712711279).

1313563556365 is an equidigital number, since it uses as much as digits as its factorization.

1313563556365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262712711278.

The product of its digits is 10935000, while the sum is 52.

The spelling of 1313563556365 in words is "one trillion, three hundred thirteen billion, five hundred sixty-three million, five hundred fifty-six thousand, three hundred sixty-five".