8726783616769 has 3 divisors (see below), whose sum is σ = 8726786570883. Its totient is φ = 8726780662656.

The previous prime is 8726783616763. The next prime is 8726783616773. The reversal of 8726783616769 is 9676163876278.

The square root of 8726783616769 is 2954113.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 4916042356225 + 3810741260544 = 2217215^2 + 1952112^2 .

It is not a de Polignac number, because 8726783616769 - 2²⁹ = 8726246745857 is a prime.

It is a super-2 number, since 2×8726783616769² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8726783616695 and 8726783616704.

It is not an unprimeable number, because it can be changed into a prime (8726783616763) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1477057 + ... + 4431169.

It is an arithmetic number, because the mean of its divisors is an integer number (2908928856961).

Almost surely, 2^{8726783616769} is an apocalyptic number.

8726783616769 is the 2954113-rd square number.

8726783616769 is the 1477057-th centered octagonal number.

It is an amenable number.

8726783616769 is a deficient number, since it is larger than the sum of its proper divisors (2954114).

8726783616769 is an frugal number, since it uses more digits than its factorization.

8726783616769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5908226 (or 2954113 counting only the distinct ones).

The product of its digits is 1536288768, while the sum is 76.

The spelling of 8726783616769 in words is "eight trillion, seven hundred twenty-six billion, seven hundred eighty-three million, six hundred sixteen thousand, seven hundred sixty-nine".