2558991694 has 16 divisors (see below), whose sum is σ = 4387852800. Its totient is φ = 1096458264.

The previous prime is 2558991653. The next prime is 2558991733. The reversal of 2558991694 is 4961998552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50287 + ... + 87445.

It is an arithmetic number, because the mean of its divisors is an integer number (274240800).

Almost surely, 2^2558991694 is an apocalyptic number.

2558991694 is a deficient number, since it is larger than the sum of its proper divisors (1828861106).

2558991694 is a wasteful number, since it uses less digits than its factorization.

2558991694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42087.

The product of its digits is 6998400, while the sum is 58.

The square root of 2558991694 is about 50586.4773827947. The cubic root of 2558991694 is about 1367.8011317764.

The spelling of 2558991694 in words is "two billion, five hundred fifty-eight million, nine hundred ninety-one thousand, six hundred ninety-four".