1311265436506 has 16 divisors (see below), whose sum is σ = 1996295235840. Its totient is φ = 645834087360.

The previous prime is 1311265436483. The next prime is 1311265436561. The reversal of 1311265436506 is 6056345621131.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12688050 + ... + 12790978.

It is an arithmetic number, because the mean of its divisors is an integer number (124768452240).

Almost surely, 2^{1311265436506} is an apocalyptic number.

1311265436506 is a deficient number, since it is larger than the sum of its proper divisors (685029799334).

1311265436506 is a wasteful number, since it uses less digits than its factorization.

1311265436506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198069.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 1311265436506 in words is "one trillion, three hundred eleven billion, two hundred sixty-five million, four hundred thirty-six thousand, five hundred six".