8721511716 has 24 divisors (see below), whose sum is σ = 20439065920. Its totient is φ = 2894474592.

The previous prime is 8721511681. The next prime is 8721511763. The reversal of 8721511716 is 6171151278.

8721511716 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×8721511716² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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, 1584136 + ... + 1589631.

Almost surely, 2^8721511716 is an apocalyptic number.

It is an amenable number.

8721511716 is an abundant number, since it is smaller than the sum of its proper divisors (11717554204).

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

8721511716 is a wasteful number, since it uses less digits than its factorization.

8721511716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3174003 (or 3174001 counting only the distinct ones).

The product of its digits is 23520, while the sum is 39.

The square root of 8721511716 is about 93389.0342385015. The cubic root of 8721511716 is about 2058.4038690175.

The spelling of 8721511716 in words is "eight billion, seven hundred twenty-one million, five hundred eleven thousand, seven hundred sixteen".