1311603432065 has 8 divisors (see below), whose sum is σ = 1582079166888. Its totient is φ = 1043846046720.

The previous prime is 1311603431993. The next prime is 1311603432101. The reversal of 1311603432065 is 5602343061131.

It can be written as a sum of positive squares in 4 ways, for example, as 17942870401 + 1293660561664 = 133951^2 + 1137392^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1311603432065 - 2²⁰ = 1311602383489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 679586306 + ... + 679588235.

It is an arithmetic number, because the mean of its divisors is an integer number (197759895861).

Almost surely, 2^{1311603432065} is an apocalyptic number.

It is an amenable number.

1311603432065 is a deficient number, since it is larger than the sum of its proper divisors (270475734823).

1311603432065 is a wasteful number, since it uses less digits than its factorization.

1311603432065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1359174739.

The product of its (nonzero) digits is 38880, while the sum is 35.

Adding to 1311603432065 its reverse (5602343061131), we get a palindrome (6913946493196).

The spelling of 1311603432065 in words is "one trillion, three hundred eleven billion, six hundred three million, four hundred thirty-two thousand, sixty-five".