1317590665687 has 8 divisors (see below), whose sum is σ = 1319754157776. Its totient is φ = 1315428291072.

The previous prime is 1317590665631. The next prime is 1317590665693. The reversal of 1317590665687 is 7865660957131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1317590665687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317590665187) 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 7 ways as a sum of consecutive naturals, for example, 2097288 + ... + 2652130.

It is an arithmetic number, because the mean of its divisors is an integer number (164969269722).

Almost surely, 2^{1317590665687} is an apocalyptic number.

1317590665687 is a deficient number, since it is larger than the sum of its proper divisors (2163492089).

1317590665687 is an equidigital number, since it uses as much as digits as its factorization.

1317590665687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558737.

The product of its (nonzero) digits is 57153600, while the sum is 64.

The spelling of 1317590665687 in words is "one trillion, three hundred seventeen billion, five hundred ninety million, six hundred sixty-five thousand, six hundred eighty-seven".