2605528657 has 2 divisors, whose sum is σ = 2605528658. Its totient is φ = 2605528656.

The previous prime is 2605528649. The next prime is 2605528661. The reversal of 2605528657 is 7568255062.

2605528657 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., 1852355521 + 753173136 = 43039^2 + 27444^2 .

It is a cyclic number.

It is not a de Polignac number, because 2605528657 - 2³ = 2605528649 is a prime.

It is not a weakly prime, because it can be changed into another prime (2605528157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1302764328 + 1302764329.

It is an arithmetic number, because the mean of its divisors is an integer number (1302764329).

Almost surely, 2^2605528657 is an apocalyptic number.

It is an amenable number.

2605528657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2605528657 is an equidigital number, since it uses as much as digits as its factorization.

2605528657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008000, while the sum is 46.

The square root of 2605528657 is about 51044.3792890069. The cubic root of 2605528657 is about 1376.0428288637.

The spelling of 2605528657 in words is "two billion, six hundred five million, five hundred twenty-eight thousand, six hundred fifty-seven".