2558998999 has 4 divisors (see below), whose sum is σ = 2559118936. Its totient is φ = 2558879064.

The previous prime is 2558998997. The next prime is 2558999011. The reversal of 2558998999 is 9998998552.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2558998999 - 2¹ = 2558998997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2558998997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18324 + ... + 73849.

It is an arithmetic number, because the mean of its divisors is an integer number (639779734).

Almost surely, 2^2558998999 is an apocalyptic number.

2558998999 is a deficient number, since it is larger than the sum of its proper divisors (119937).

2558998999 is an equidigital number, since it uses as much as digits as its factorization.

2558998999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119936.

The product of its digits is 188956800, while the sum is 73.

The square root of 2558998999 is about 50586.5495858336. The cubic root of 2558998999 is about 1367.8024333018.

The spelling of 2558998999 in words is "two billion, five hundred fifty-eight million, nine hundred ninety-eight thousand, nine hundred ninety-nine".