2558323561 has 2 divisors, whose sum is σ = 2558323562. Its totient is φ = 2558323560.

The previous prime is 2558323553. The next prime is 2558323583. The reversal of 2558323561 is 1653238552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2413265625 + 145057936 = 49125^2 + 12044^2 .

It is a cyclic number.

It is not a de Polignac number, because 2558323561 - 2³ = 2558323553 is a prime.

It is not a weakly prime, because it can be changed into another prime (2558323531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1279161780 + 1279161781.

It is an arithmetic number, because the mean of its divisors is an integer number (1279161781).

Almost surely, 2^2558323561 is an apocalyptic number.

It is an amenable number.

2558323561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2558323561 is an equidigital number, since it uses as much as digits as its factorization.

2558323561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216000, while the sum is 40.

The square root of 2558323561 is about 50579.8730820867. The cubic root of 2558323561 is about 1367.6820806384.

The spelling of 2558323561 in words is "two billion, five hundred fifty-eight million, three hundred twenty-three thousand, five hundred sixty-one".