1311655130565 has 16 divisors (see below), whose sum is σ = 2260082686848. Its totient is φ = 645737910336.

The previous prime is 1311655130563. The next prime is 1311655130609. The reversal of 1311655130565 is 5650315561131.

It is not a de Polignac number, because 1311655130565 - 2¹ = 1311655130563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311655130563) 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, 3363218089 + ... + 3363218478.

It is an arithmetic number, because the mean of its divisors is an integer number (141255167928).

Almost surely, 2^{1311655130565} is an apocalyptic number.

1311655130565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311655130565 is a deficient number, since it is larger than the sum of its proper divisors (948427556283).

1311655130565 is a wasteful number, since it uses less digits than its factorization.

1311655130565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6726436588.

The product of its (nonzero) digits is 202500, while the sum is 42.

The spelling of 1311655130565 in words is "one trillion, three hundred eleven billion, six hundred fifty-five million, one hundred thirty thousand, five hundred sixty-five".