1312616365 has 16 divisors (see below), whose sum is σ = 1621166400. Its totient is φ = 1019838592.

The previous prime is 1312616309. The next prime is 1312616369. The reversal of 1312616365 is 5636162131.

It is a cyclic number.

It is not a de Polignac number, because 1312616365 - 2¹³ = 1312608173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1312616365.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312616369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2320 + ... + 51289.

It is an arithmetic number, because the mean of its divisors is an integer number (101322900).

Almost surely, 2^1312616365 is an apocalyptic number.

It is an amenable number.

1312616365 is a deficient number, since it is larger than the sum of its proper divisors (308550035).

1312616365 is an equidigital number, since it uses as much as digits as its factorization.

1312616365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53756.

The product of its digits is 19440, while the sum is 34.

The square root of 1312616365 is about 36230.0478194551. The cubic root of 1312616365 is about 1094.9121410154.

Adding to 1312616365 its reverse (5636162131), we get a palindrome (6948778496).

The spelling of 1312616365 in words is "one billion, three hundred twelve million, six hundred sixteen thousand, three hundred sixty-five".