2681607809 has 2 divisors, whose sum is σ = 2681607810. Its totient is φ = 2681607808.

The previous prime is 2681607791. The next prime is 2681607827. The reversal of 2681607809 is 9087061862.

2681607809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (2681607791) and next prime (2681607827).

It can be written as a sum of positive squares in only one way, i.e., 2656887025 + 24720784 = 51545^2 + 4972^2 .

It is a cyclic number.

It is not a de Polignac number, because 2681607809 - 2⁸ = 2681607553 is a prime.

It is not a weakly prime, because it can be changed into another prime (2681607899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340803904 + 1340803905.

It is an arithmetic number, because the mean of its divisors is an integer number (1340803905).

Almost surely, 2^2681607809 is an apocalyptic number.

It is an amenable number.

2681607809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2681607809 is an equidigital number, since it uses as much as digits as its factorization.

2681607809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 2681607809 is about 51784.2428640219. The cubic root of 2681607809 is about 1389.3076290612.

The spelling of 2681607809 in words is "two billion, six hundred eighty-one million, six hundred seven thousand, eight hundred nine".