1311056603655 has 48 divisors (see below), whose sum is σ = 2168131357152. Its totient is φ = 676490035200.

The previous prime is 1311056603639. The next prime is 1311056603693. The reversal of 1311056603655 is 5563066501131.

It is not a de Polignac number, because 1311056603655 - 2⁴ = 1311056603639 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64583467 + ... + 64603763.

It is an arithmetic number, because the mean of its divisors is an integer number (45169403274).

Almost surely, 2^{1311056603655} is an apocalyptic number.

1311056603655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1311056603655 is a deficient number, since it is larger than the sum of its proper divisors (857074753497).

1311056603655 is a wasteful number, since it uses less digits than its factorization.

1311056603655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24848 (or 24817 counting only the distinct ones).

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

The spelling of 1311056603655 in words is "one trillion, three hundred eleven billion, fifty-six million, six hundred three thousand, six hundred fifty-five".