1317851668 has 18 divisors (see below), whose sum is σ = 2682769866. Its totient is φ = 564793488.

The previous prime is 1317851663. The next prime is 1317851683. The reversal of 1317851668 is 8661587131.

It can be written as a sum of positive squares in only one way, i.e., 1075052944 + 242798724 = 32788^2 + 15582^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317851663) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 3361671 + ... + 3362062.

Almost surely, 2^1317851668 is an apocalyptic number.

It is an amenable number.

1317851668 is an abundant number, since it is smaller than the sum of its proper divisors (1364918198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1317851668 is a wasteful number, since it uses less digits than its factorization.

1317851668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6723751 (or 6723742 counting only the distinct ones).

The product of its digits is 241920, while the sum is 46.

The square root of 1317851668 is about 36302.2267636574. The cubic root of 1317851668 is about 1096.3658769668.

It can be divided in two parts, 13178 and 51668, that added together give a palindrome (64846).

The spelling of 1317851668 in words is "one billion, three hundred seventeen million, eight hundred fifty-one thousand, six hundred sixty-eight".