1368369565 has 4 divisors (see below), whose sum is σ = 1642043484. Its totient is φ = 1094695648.

The previous prime is 1368369511. The next prime is 1368369599. The reversal of 1368369565 is 5659638631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5659638631 = 6329 ⋅894239.

It can be written as a sum of positive squares in 2 ways, for example, as 739513636 + 628855929 = 27194^2 + 25077^2 .

It is a cyclic number.

It is not a de Polignac number, because 1368369565 - 2²³ = 1359980957 is a prime.

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, 136836952 + ... + 136836961.

It is an arithmetic number, because the mean of its divisors is an integer number (410510871).

Almost surely, 2^1368369565 is an apocalyptic number.

It is an amenable number.

1368369565 is a deficient number, since it is larger than the sum of its proper divisors (273673919).

1368369565 is an equidigital number, since it uses as much as digits as its factorization.

1368369565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273673918.

The product of its digits is 3499200, while the sum is 52.

The square root of 1368369565 is about 36991.4796270709. The cubic root of 1368369565 is about 1110.1997760166.

The spelling of 1368369565 in words is "one billion, three hundred sixty-eight million, three hundred sixty-nine thousand, five hundred sixty-five".