8076321720769 has 27 divisors (see below), whose sum is σ = 8568043103529. Its totient is φ = 7611710140800.

The previous prime is 8076321720671. The next prime is 8076321720791. The reversal of 8076321720769 is 9670271236708.

The square root of 8076321720769 is 2841887.

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

It can be written as a sum of positive squares in 4 ways, for example, as 3584414495025 + 4491907225744 = 1893255^2 + 2119412^2 .

It is a de Polignac number, because none of the positive numbers 2^k-8076321720769 is a prime.

It is a super-2 number, since 2×8076321720769² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8076321720169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 20140452969 + ... + 20140453369.

Almost surely, 2^{8076321720769} is an apocalyptic number.

8076321720769 is the 2841887-th square number.

8076321720769 is the 1420944-th centered octagonal number.

It is an amenable number.

8076321720769 is a deficient number, since it is larger than the sum of its proper divisors (491721382760).

8076321720769 is an frugal number, since it uses more digits than its factorization.

8076321720769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586 (or 793 counting only the distinct ones).

The product of its (nonzero) digits is 10668672, while the sum is 58.

The spelling of 8076321720769 in words is "eight trillion, seventy-six billion, three hundred twenty-one million, seven hundred twenty thousand, seven hundred sixty-nine".