2558138817 has 32 divisors (see below), whose sum is σ = 3800079360. Its totient is φ = 1520098560.

The previous prime is 2558138783. The next prime is 2558138839. The reversal of 2558138817 is 7188318552.

It is not a de Polignac number, because 2558138817 - 2⁶ = 2558138753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2558138887) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 613303 + ... + 617459.

It is an arithmetic number, because the mean of its divisors is an integer number (118752480).

Almost surely, 2^2558138817 is an apocalyptic number.

It is an amenable number.

2558138817 is a deficient number, since it is larger than the sum of its proper divisors (1241940543).

2558138817 is a wasteful number, since it uses less digits than its factorization.

2558138817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4713.

The product of its digits is 537600, while the sum is 48.

The square root of 2558138817 is about 50578.0467890962. The cubic root of 2558138817 is about 1367.6491584096.

The spelling of 2558138817 in words is "two billion, five hundred fifty-eight million, one hundred thirty-eight thousand, eight hundred seventeen".