816260569 has 2 divisors, whose sum is σ = 816260570. Its totient is φ = 816260568.

The previous prime is 816260509. The next prime is 816260573. The reversal of 816260569 is 965062618.

816260569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 735494400 + 80766169 = 27120^2 + 8987^2 .

It is a cyclic number.

It is not a de Polignac number, because 816260569 - 2¹³ = 816252377 is a prime.

It is a super-2 number, since 2×816260569² = 1332562633008407522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (816260509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408130284 + 408130285.

It is an arithmetic number, because the mean of its divisors is an integer number (408130285).

Almost surely, 2^816260569 is an apocalyptic number.

It is an amenable number.

816260569 is a deficient number, since it is larger than the sum of its proper divisors (1).

816260569 is an equidigital number, since it uses as much as digits as its factorization.

816260569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 816260569 is about 28570.2742198951. The cubic root of 816260569 is about 934.5652011007.

The spelling of 816260569 in words is "eight hundred sixteen million, two hundred sixty thousand, five hundred sixty-nine".