8120352769 has 9 divisors (see below), whose sum is σ = 8213772297. Its totient is φ = 8027986944.

The previous prime is 8120352763. The next prime is 8120352803. The reversal of 8120352769 is 9672530218.

The square root of 8120352769 is 90113.

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 3347201025 + 4773151744 = 57855^2 + 69088^2 .

It is not a de Polignac number, because 8120352769 - 2⁷ = 8120352641 is a prime.

It is a super-2 number, since 2×8120352769² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8120352763) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8740497 + ... + 8741425.

Almost surely, 2^8120352769 is an apocalyptic number.

8120352769 is the 90113-rd square number.

8120352769 is the 45057-th centered octagonal number.

It is an amenable number.

8120352769 is a deficient number, since it is larger than the sum of its proper divisors (93419528).

8120352769 is an frugal number, since it uses more digits than its factorization.

8120352769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052 (or 1026 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The cubic root of 8120352769 is about 2009.9795191926.

The spelling of 8120352769 in words is "eight billion, one hundred twenty million, three hundred fifty-two thousand, seven hundred sixty-nine".