2605315771 has 2 divisors, whose sum is σ = 2605315772. Its totient is φ = 2605315770.

The previous prime is 2605315747. The next prime is 2605315789. The reversal of 2605315771 is 1775135062.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2605315771 - 2⁹ = 2605315259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2605315771.

It is not a weakly prime, because it can be changed into another prime (2605315171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1302657885 + 1302657886.

It is an arithmetic number, because the mean of its divisors is an integer number (1302657886).

Almost surely, 2^2605315771 is an apocalyptic number.

2605315771 is a deficient number, since it is larger than the sum of its proper divisors (1).

2605315771 is an equidigital number, since it uses as much as digits as its factorization.

2605315771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 2605315771 is about 51042.2939433564. The cubic root of 2605315771 is about 1376.0053510910.

The spelling of 2605315771 in words is "two billion, six hundred five million, three hundred fifteen thousand, seven hundred seventy-one".