2680808569 has 4 divisors (see below), whose sum is σ = 2684914596. Its totient is φ = 2676702544.

The previous prime is 2680808563. The next prime is 2680808573. The reversal of 2680808569 is 9658080862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9658080862 = 2 ⋅4829040431.

It can be written as a sum of positive squares in 2 ways, for example, as 1343955600 + 1336852969 = 36660^2 + 36563^2 .

It is a cyclic number.

It is not a de Polignac number, because 2680808569 - 2³ = 2680808561 is a prime.

It is a super-2 number, since 2×2680808569² = 14373469167247655522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2680808561) 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 3 ways as a sum of consecutive naturals, for example, 2052034 + ... + 2053339.

It is an arithmetic number, because the mean of its divisors is an integer number (671228649).

Almost surely, 2^2680808569 is an apocalyptic number.

It is an amenable number.

2680808569 is a deficient number, since it is larger than the sum of its proper divisors (4106027).

2680808569 is an equidigital number, since it uses as much as digits as its factorization.

2680808569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4106026.

The product of its (nonzero) digits is 1658880, while the sum is 52.

The square root of 2680808569 is about 51776.5252696625. The cubic root of 2680808569 is about 1389.1695899143.

The spelling of 2680808569 in words is "two billion, six hundred eighty million, eight hundred eight thousand, five hundred sixty-nine".