2558397641 has 2 divisors, whose sum is σ = 2558397642. Its totient is φ = 2558397640.

The previous prime is 2558397637. The next prime is 2558397679. The reversal of 2558397641 is 1467938552.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2537237641 + 21160000 = 50371^2 + 4600^2 .

It is a cyclic number.

It is not a de Polignac number, because 2558397641 - 2² = 2558397637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2558397641.

It is not a weakly prime, because it can be changed into another prime (2558397691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1279198820 + 1279198821.

It is an arithmetic number, because the mean of its divisors is an integer number (1279198821).

Almost surely, 2^2558397641 is an apocalyptic number.

It is an amenable number.

2558397641 is a deficient number, since it is larger than the sum of its proper divisors (1).

2558397641 is an equidigital number, since it uses as much as digits as its factorization.

2558397641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 50.

The square root of 2558397641 is about 50580.6053838821. The cubic root of 2558397641 is about 1367.6952815892.

The spelling of 2558397641 in words is "two billion, five hundred fifty-eight million, three hundred ninety-seven thousand, six hundred forty-one".