1317681067887 has 48 divisors (see below), whose sum is σ = 1979120332800. Its totient is φ = 843791618880.

The previous prime is 1317681067819. The next prime is 1317681067903. The reversal of 1317681067887 is 7887601867131.

It is not a de Polignac number, because 1317681067887 - 2¹⁸ = 1317680805743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317681067387) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42436914 + ... + 42467952.

It is an arithmetic number, because the mean of its divisors is an integer number (41231673600).

Almost surely, 2^{1317681067887} is an apocalyptic number.

1317681067887 is a deficient number, since it is larger than the sum of its proper divisors (661439264913).

1317681067887 is a wasteful number, since it uses less digits than its factorization.

1317681067887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31908 (or 31905 counting only the distinct ones).

The product of its (nonzero) digits is 18966528, while the sum is 63.

The spelling of 1317681067887 in words is "one trillion, three hundred seventeen billion, six hundred eighty-one million, sixty-seven thousand, eight hundred eighty-seven".