1311265315536 has 40 divisors (see below), whose sum is σ = 3695384072544. Its totient is φ = 397353125760.

The previous prime is 1311265315517. The next prime is 1311265315543. The reversal of 1311265315536 is 6355135621131.

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 7 ways as a sum of consecutive naturals, for example, 1241727991 + ... + 1241729046.

Almost surely, 2^{1311265315536} is an apocalyptic number.

1311265315536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1311265315536 is an abundant number, since it is smaller than the sum of its proper divisors (2384118757008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311265315536 is a wasteful number, since it uses less digits than its factorization.

1311265315536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2483457059 (or 2483457053 counting only the distinct ones).

The product of its digits is 243000, while the sum is 42.

The spelling of 1311265315536 in words is "one trillion, three hundred eleven billion, two hundred sixty-five million, three hundred fifteen thousand, five hundred thirty-six".