1317655768 has 64 divisors (see below), whose sum is σ = 2946021120. Its totient is φ = 544579200.

The previous prime is 1317655753. The next prime is 1317655783. The reversal of 1317655768 is 8675567131.

It is an interprime number because it is at equal distance from previous prime (1317655753) and next prime (1317655783).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68053 + ... + 85243.

It is an arithmetic number, because the mean of its divisors is an integer number (46031580).

Almost surely, 2^1317655768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1317655768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1473010560).

1317655768 is an abundant number, since it is smaller than the sum of its proper divisors (1628365352).

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

1317655768 is a wasteful number, since it uses less digits than its factorization.

1317655768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17288 (or 17284 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 49.

The square root of 1317655768 is about 36299.5284817861. The cubic root of 1317655768 is about 1096.3115489713.

The spelling of 1317655768 in words is "one billion, three hundred seventeen million, six hundred fifty-five thousand, seven hundred sixty-eight".