2609808779 has 2 divisors, whose sum is σ = 2609808780. Its totient is φ = 2609808778.

The previous prime is 2609808769. The next prime is 2609808787. The reversal of 2609808779 is 9778089062.

2609808779 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 is a cyclic number.

It is not a de Polignac number, because 2609808779 - 2¹⁶ = 2609743243 is a prime.

It is a super-2 number, since 2×2609808779² = 13622203725890941682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2609808739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1304904389 + 1304904390.

It is an arithmetic number, because the mean of its divisors is an integer number (1304904390).

Almost surely, 2^2609808779 is an apocalyptic number.

2609808779 is a deficient number, since it is larger than the sum of its proper divisors (1).

2609808779 is an equidigital number, since it uses as much as digits as its factorization.

2609808779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3048192, while the sum is 56.

The square root of 2609808779 is about 51086.2875828730. The cubic root of 2609808779 is about 1376.7958953771.

The spelling of 2609808779 in words is "two billion, six hundred nine million, eight hundred eight thousand, seven hundred seventy-nine".