1317655067681 has 4 divisors (see below), whose sum is σ = 1317755642112. Its totient is φ = 1317554493252.

The previous prime is 1317655067669. The next prime is 1317655067717. The reversal of 1317655067681 is 1867605567131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1317655067681 - 2³⁴ = 1300475198497 is a prime.

It is a super-2 number, since 2×1317655067681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1317655064681) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 50267561 + ... + 50293766.

It is an arithmetic number, because the mean of its divisors is an integer number (329438910528).

Almost surely, 2^{1317655067681} is an apocalyptic number.

It is an amenable number.

1317655067681 is a deficient number, since it is larger than the sum of its proper divisors (100574431).

1317655067681 is a wasteful number, since it uses less digits than its factorization.

1317655067681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100574430.

The product of its (nonzero) digits is 6350400, while the sum is 56.

It can be divided in two parts, 13176550 and 67681, that added together give a palindrome (13244231).

The spelling of 1317655067681 in words is "one trillion, three hundred seventeen billion, six hundred fifty-five million, sixty-seven thousand, six hundred eighty-one".