1317661056 has 48 divisors (see below), whose sum is σ = 3791710260. Its totient is φ = 439219968.

The previous prime is 1317661043. The next prime is 1317661063. The reversal of 1317661056 is 6501667131.

1317661056 is a `hidden beast` number, since 1 + 31 + 7 + 6 + 610 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1317661056.

It is a congruent number.

It is an unprimeable number.

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, 570750 + ... + 573053.

Almost surely, 2^1317661056 is an apocalyptic number.

1317661056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1317661056 is an abundant number, since it is smaller than the sum of its proper divisors (2474049204).

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

1317661056 is a wasteful number, since it uses less digits than its factorization.

1317661056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143823 (or 1143808 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 1317661056 is about 36299.6013201247. The cubic root of 1317661056 is about 1096.3130155374.

The spelling of 1317661056 in words is "one billion, three hundred seventeen million, six hundred sixty-one thousand, fifty-six".