9718672857 has 8 divisors (see below), whose sum is σ = 12966350976. Its totient is φ = 6475054992.

The previous prime is 9718672853. The next prime is 9718672861. The reversal of 9718672857 is 7582768179.

9718672857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9718672853) and next prime (9718672861).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9718672857 - 2² = 9718672853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9718672857.

It is not an unprimeable number, because it can be changed into a prime (9718672853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1009473 + ... + 1019054.

It is an arithmetic number, because the mean of its divisors is an integer number (1620793872).

Almost surely, 2^9718672857 is an apocalyptic number.

It is an amenable number.

9718672857 is a deficient number, since it is larger than the sum of its proper divisors (3247678119).

9718672857 is a wasteful number, since it uses less digits than its factorization.

9718672857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2030127.

The product of its digits is 11854080, while the sum is 60.

The square root of 9718672857 is about 98583.3295085939. The cubic root of 9718672857 is about 2134.0388485190.

The spelling of 9718672857 in words is "nine billion, seven hundred eighteen million, six hundred seventy-two thousand, eight hundred fifty-seven".