317728678557 has 4 divisors (see below), whose sum is σ = 423638238080. Its totient is φ = 211819119036.

The previous prime is 317728678511. The next prime is 317728678567. The reversal of 317728678557 is 755876827713.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 317728678557 - 2⁶ = 317728678493 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 (317728678507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52954779757 + ... + 52954779762.

It is an arithmetic number, because the mean of its divisors is an integer number (105909559520).

Almost surely, 2^317728678557 is an apocalyptic number.

It is an amenable number.

317728678557 is a deficient number, since it is larger than the sum of its proper divisors (105909559523).

317728678557 is a wasteful number, since it uses less digits than its factorization.

317728678557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105909559522.

The product of its digits is 138297600, while the sum is 66.

The spelling of 317728678557 in words is "three hundred seventeen billion, seven hundred twenty-eight million, six hundred seventy-eight thousand, five hundred fifty-seven".