8717256516 has 12 divisors (see below), whose sum is σ = 20340265232. Its totient is φ = 2905752168.

The previous prime is 8717256469. The next prime is 8717256551. The reversal of 8717256516 is 6156527178.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×8717256516² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363219010 + ... + 363219033.

Almost surely, 2^8717256516 is an apocalyptic number.

It is an amenable number.

8717256516 is an abundant number, since it is smaller than the sum of its proper divisors (11623008716).

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

8717256516 is a wasteful number, since it uses less digits than its factorization.

8717256516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726438050 (or 726438048 counting only the distinct ones).

The product of its digits is 705600, while the sum is 48.

The square root of 8717256516 is about 93366.2493409690. The cubic root of 8717256516 is about 2058.0690514882.

The spelling of 8717256516 in words is "eight billion, seven hundred seventeen million, two hundred fifty-six thousand, five hundred sixteen".