8729684796816 has 45 divisors (see below), whose sum is σ = 24431092094721. Its totient is φ = 2909883113856.

The previous prime is 8729684796803. The next prime is 8729684796839. The reversal of 8729684796816 is 6186974869278.

The square root of 8729684796816 is 2954604.

It is a perfect power (a square), and thus also a powerful number.

8729684796816 is a `hidden beast` number, since 8 + 7 + 2 + 9 + 68 + 479 + 6 + 81 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 654448640400 + 8075236156416 = 808980^2 + 2841696^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 35332140 + ... + 35578356.

Almost surely, 2^{8729684796816} is an apocalyptic number.

8729684796816 is the 2954604-th square number.

It is an amenable number.

8729684796816 is an abundant number, since it is smaller than the sum of its proper divisors (15701407297905).

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

8729684796816 is an frugal number, since it uses more digits than its factorization.

8729684796816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492448 (or 246222 counting only the distinct ones).

The product of its digits is 3511517184, while the sum is 81.

Multiplying 8729684796816 by its sum of digits (81), we get a square (707104468542096 = 26591436²).

The spelling of 8729684796816 in words is "eight trillion, seven hundred twenty-nine billion, six hundred eighty-four million, seven hundred ninety-six thousand, eight hundred sixteen".