8717170947947 has 48 divisors (see below), whose sum is σ = 11415659200512. Its totient is φ = 6508398600000.

The previous prime is 8717170947943. The next prime is 8717170947971. The reversal of 8717170947947 is 7497490717178.

It is not a de Polignac number, because 8717170947947 - 2² = 8717170947943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8717170947943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1008422 + ... + 4295492.

It is an arithmetic number, because the mean of its divisors is an integer number (237826233344).

Almost surely, 2^{8717170947947} is an apocalyptic number.

8717170947947 is a deficient number, since it is larger than the sum of its proper divisors (2698488252565).

8717170947947 is a wasteful number, since it uses less digits than its factorization.

8717170947947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3287232 (or 3287221 counting only the distinct ones).

The product of its (nonzero) digits is 174254976, while the sum is 71.

The spelling of 8717170947947 in words is "eight trillion, seven hundred seventeen billion, one hundred seventy million, nine hundred forty-seven thousand, nine hundred forty-seven".